diff --git a/modules/app_video.py b/modules/app_video.py
index 7b6a3e0..e78d570 100644
--- a/modules/app_video.py
+++ b/modules/app_video.py
@@ -62,7 +62,9 @@ def _convert_bg(relative_path):
                 "ffmpeg", "-nostdin", "-loglevel", "error", "-y",
                 "-i", source_path,
                 "-c:v", "h264_v4l2m2m",
+                "-b:v", "4M",        # 4 Mbps — good quality, ~100MB per 3-min clip
                 "-c:a", "aac",
+                "-b:a", "128k",
                 "-movflags", "faststart",
                 "-f", "mp4",
                 tmp_path,