diff --git a/modules/app_dash.py b/modules/app_dash.py
index 62ac732..1ff4e9d 100644
--- a/modules/app_dash.py
+++ b/modules/app_dash.py
@@ -520,6 +520,9 @@ def copy_files(source_folder, destination_folder, relative_paths=None):
         try:
             shutil.copy2(abs_path, dest_path)
             copied += 1
+            # Queue background conversion if enabled (import app_video lazily to avoid circular import)
+            from modules import app_video as _app_video
+            _app_video.queue_convert(rel_path)
         except OSError as e:
             errors.append(f"{rel_path}: {e}")
 
diff --git a/modules/app_settings.py b/modules/app_settings.py
index 0516b23..fd05272 100644
--- a/modules/app_settings.py
+++ b/modules/app_settings.py
@@ -38,6 +38,7 @@ def get_settings():
     return {
         "dashcam_upload_enabled": app_upload.is_dashcam_upload_enabled(),
         "local_video_retention_days": app_video.retention_days(),
+        "video_convert_enabled": app_video.is_convert_enabled(),
         "cellular_enabled": _setting_bool(
             "cellular_enabled", "YARIS_CELLULAR_ENABLED"
         ),
@@ -98,6 +99,7 @@ def update_settings(body):
     values = {}
     for field in (
         "dashcam_upload_enabled",
+        "video_convert_enabled",
         "cellular_enabled",
         "ntfy_enabled",
         "clear_ntfy_url",
@@ -182,9 +184,8 @@ def update_settings(body):
         app_upload.DASHCAM_UPLOAD_SETTING_KEY: (
             "1" if values["dashcam_upload_enabled"] else "0"
         ),
-        app_video.RETENTION_SETTING: str(
-            values["local_video_retention_days"]
-        ),
+        app_video.RETENTION_SETTING: str(values["local_video_retention_days"]),
+        app_video.CONVERT_SETTING: "1" if values["video_convert_enabled"] else "0",
         "cellular_enabled": "1" if values["cellular_enabled"] else "0",
         "cellular_apn": apn,
         "alerts_enabled": "1" if values["ntfy_enabled"] else "0",
diff --git a/modules/app_video.py b/modules/app_video.py
index 9216cff..17f2d2f 100644
--- a/modules/app_video.py
+++ b/modules/app_video.py
@@ -12,10 +12,76 @@ from modules import app_dash, app_sql
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 THUMBNAIL_DIR = os.path.join(BASE_DIR, "dash", "thumbnails")
 RETENTION_SETTING = "local_video_retention_days"
+CONVERT_SETTING = "video_convert_enabled"
 _thumbnail_lock = Semaphore()
-# Tracks which relative paths are currently being generated (set of strings)
 _generating = set()
 _generating_lock = Semaphore()
+_converting = set()
+_converting_lock = Semaphore()
+
+
+def is_convert_enabled():
+    return app_sql.get_setting(CONVERT_SETTING, "0") == "1"
+
+
+def queue_convert(relative_path):
+    """Spawn a background greenlet to re-encode relative_path to web-ready MP4.
+    No-op if conversion is disabled, already running, or file is already MP4."""
+    if not is_convert_enabled():
+        return
+    if relative_path.lower().endswith(".mp4"):
+        return
+    with _converting_lock:
+        if relative_path in _converting:
+            return
+        _converting.add(relative_path)
+    gevent.spawn(_convert_bg, relative_path)
+
+
+def _convert_bg(relative_path):
+    try:
+        source_path = _local_path(relative_path)
+        mp4_relative = os.path.splitext(relative_path)[0] + ".mp4"
+        mp4_path = _local_path(mp4_relative)
+
+        if not app_dash.begin_local_video_use(relative_path):
+            return
+
+        try:
+            tmp_path = mp4_path + ".converting.mp4"
+            cmd = [
+                "ffmpeg", "-nostdin", "-loglevel", "error", "-y",
+                "-i", source_path,
+                "-c:v", "h264_v4l2m2m",
+                "-c:a", "aac",
+                "-movflags", "faststart",
+                "-f", "mp4",
+                tmp_path,
+            ]
+            proc = subprocess.Popen(cmd, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+            while proc.poll() is None:
+                sleep(1)
+            if proc.returncode == 0 and os.path.isfile(tmp_path) and os.path.getsize(tmp_path) > 0:
+                os.replace(tmp_path, mp4_path)
+                # Delete original now that MP4 is ready
+                try:
+                    os.remove(source_path)
+                except OSError:
+                    pass
+                # Also remove old thumbnail so it gets regenerated from MP4
+                _source, thumb = _thumbnail_path(relative_path)
+                if os.path.isfile(thumb):
+                    try:
+                        os.remove(thumb)
+                    except OSError:
+                        pass
+            elif os.path.exists(tmp_path):
+                os.remove(tmp_path)
+        finally:
+            app_dash.end_local_video_use(relative_path)
+    finally:
+        with _converting_lock:
+            _converting.discard(relative_path)
 
 
 def _local_path(relative_path):
@@ -47,6 +113,8 @@ def list_local_videos():
         except OSError as e:
             errors.append(f"{relative_path}: {e}")
             continue
+        with _converting_lock:
+            converting = relative_path in _converting
         files.append(
             {
                 "path": relative_path,
@@ -57,6 +125,7 @@ def list_local_videos():
                     stat.st_size,
                     stat.st_mtime,
                 ) in uploaded_stats,
+                "converting": converting,
             }
         )
         total_size += stat.st_size
diff --git a/static/js/local-videos.js b/static/js/local-videos.js
index b419b6d..da10d9f 100644
--- a/static/js/local-videos.js
+++ b/static/js/local-videos.js
@@ -91,12 +91,13 @@
         body.replaceChildren();
         const files = result.files || [];
         let uploadedCount = 0;
+        let convertingCount = 0;
 
         files.forEach(function (file) {
             const row = document.createElement("tr");
             row.dataset.path = file.path;
 
-            // Thumbnail cell
+            // Thumbnail cell — also contains filename for mobile view
             const preview = document.createElement("td");
             preview.style.width = "9rem";
             preview.style.padding = "0.25rem";
@@ -105,6 +106,12 @@
             image.alt = "";
             image.dataset.path = file.path;
             preview.appendChild(image);
+            // Filename shown only on mobile (hidden on desktop via CSS)
+            const mobileLabel = document.createElement("div");
+            mobileLabel.className = "dash-thumb-name text-truncate small mt-1";
+            mobileLabel.style.maxWidth = "5rem";
+            mobileLabel.textContent = file.path.split("/").pop();
+            preview.appendChild(mobileLabel);
             row.appendChild(preview);
             thumbnailObserver.observe(image);
 
@@ -124,19 +131,25 @@
             dateCell.className = "dash-col-date";
             row.appendChild(dateCell);
 
-            // Upload badge
+            // Upload / convert badge
             const upload = document.createElement("td");
             upload.className = "dash-col-upload";
             const badge = document.createElement("span");
-            badge.className = file.uploaded ? "badge bg-success" : "badge bg-warning text-dark";
-            badge.textContent = file.uploaded ? "✓" : "…";
+            if (file.converting) {
+                badge.className = "badge bg-info text-dark";
+                badge.innerHTML = '<i class="fas fa-spinner fa-spin me-1"></i>Converting';
+                convertingCount++;
+            } else {
+                badge.className = file.uploaded ? "badge bg-success" : "badge bg-warning text-dark";
+                badge.textContent = file.uploaded ? "✓" : "…";
+            }
             upload.appendChild(badge);
             row.appendChild(upload);
             if (file.uploaded) uploadedCount++;
 
             // Actions — wrap in div so td stays a table cell (not flex)
             const actionsTd = document.createElement("td");
-            actionsTd.style.whiteSpace = "nowrap";
+            actionsTd.className = "dash-actions-td";
             const actionsDiv = document.createElement("div");
             actionsDiv.className = "data-list-actions";
 
@@ -160,12 +173,17 @@
         });
 
         summary.textContent = `${files.length} video(s), ${YarisUI.formatBytes(result.total_size || 0)} total, ${uploadedCount} uploaded`;
+        if (convertingCount > 0) summary.textContent += `; ${convertingCount} converting…`;
         if (result.retention_days > 0) {
-            summary.textContent += `; >  ${result.retention_days}d uploaded auto-deleted`;
+            summary.textContent += `; > ${result.retention_days}d uploaded auto-deleted`;
         }
         if (result.errors && result.errors.length) {
             summary.textContent += ` (${result.errors.length} error(s))`;
         }
+        // Auto-refresh every 10s while conversions are running
+        if (convertingCount > 0) {
+            setTimeout(refreshFiles, 10000);
+        }
     }
 
     function refreshFiles() {
diff --git a/static/js/settings.js b/static/js/settings.js
index 7c59b08..4aee39b 100644
--- a/static/js/settings.js
+++ b/static/js/settings.js
@@ -15,6 +15,7 @@ let initialUplinkStatusLoaded = false;
 const fields = {
     dashcamUpload: document.getElementById('dashcam-upload-enabled'),
     retention: document.getElementById('retention-days'),
+    videoConvert: document.getElementById('video-convert-enabled'),
     cellularEnabled: document.getElementById('cellular-enabled'),
     cellularApn: document.getElementById('cellular-apn'),
     ntfyEnabled: document.getElementById('ntfy-enabled'),
@@ -80,6 +81,7 @@ function populate(settings) {
     const thresholds = settings.alert_thresholds;
     fields.dashcamUpload.checked = settings.dashcam_upload_enabled;
     fields.retention.value = settings.local_video_retention_days;
+    fields.videoConvert.checked = settings.video_convert_enabled;
     fields.cellularEnabled.checked = settings.cellular_enabled;
     fields.cellularApn.value = settings.cellular_apn;
     fields.ntfyEnabled.checked = settings.ntfy_enabled;
@@ -105,6 +107,7 @@ function payload() {
     return {
         dashcam_upload_enabled: fields.dashcamUpload.checked,
         local_video_retention_days: Number(fields.retention.value),
+        video_convert_enabled: fields.videoConvert.checked,
         cellular_enabled: fields.cellularEnabled.checked,
         cellular_apn: fields.cellularApn.value,
         ntfy_enabled: fields.ntfyEnabled.checked,
diff --git a/static/yaris.css b/static/yaris.css
index 52ababf..37b268a 100644
--- a/static/yaris.css
+++ b/static/yaris.css
@@ -269,18 +269,29 @@ body {
 
 /* ── Dashcam / video ─────────────────────────────────────────────────────── */
 
-/* Hide less-important columns on mobile to keep the table usable */
+/* On mobile: hide file/size/date/upload columns — only thumb+name and actions remain */
 @media (max-width: 575.98px) {
     .dash-col-size,
     .dash-col-date,
-    .dash-col-upload { display: none; }
-}
-@media (max-width: 767.98px) {
-    .dash-col-file { max-width: 8rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
-}
-/* Icon-only action buttons on mobile */
-@media (max-width: 575.98px) {
+    .dash-col-upload,
+    .dash-col-file { display: none; }
+
+    /* Show filename inside the thumbnail cell instead */
+    .dash-thumb-name { display: block !important; }
+
+    /* Shrink thumbnail on mobile */
+    .local-video-thumbnail { width: 5rem; }
+
+    /* Icon-only action buttons */
     .btn-icon-mobile .btn-label { display: none; }
+
+    /* Keep actions cell from overflowing */
+    .dash-actions-td { width: 1%; white-space: nowrap; }
+}
+
+@media (min-width: 576px) {
+    .dash-thumb-name { display: none; }
+    .dash-col-file { max-width: 12rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
 }
 
 
diff --git a/templates/settings.html b/templates/settings.html
index d3dd716..e77fea0 100644
--- a/templates/settings.html
+++ b/templates/settings.html
@@ -39,6 +39,13 @@
                 <span class="small text-muted">(0 = keep forever)</span>
             </div>
             <div class="invalid-feedback" data-error-for="local_video_retention_days"></div>
+            <div class="form-check form-switch mt-3">
+                <input class="form-check-input" type="checkbox" role="switch" id="video-convert-enabled">
+                <label class="form-check-label" for="video-convert-enabled">
+                    Convert imported videos for web playback
+                    <span class="text-muted small d-block">Re-encodes MOV→MP4 using hardware encoder in background after import. Original deleted when done.</span>
+                </label>
+            </div>
         </div>
     </div>