yt-dlp parses Facebook’s page, extracts DASH manifests, downloads segments in parallel, and uses ffmpeg to repack (concat demuxer + copy codec).
# Step 2: Find video ID (pattern may change over time) video_id_match = re.search(r'video_id":"(\d+)"', html) if not video_id_match: raise Exception("Could not extract video ID. Facebook layout may have changed.") video_id = video_id_match.group(1) script download facebook video repack