: Tools like yt-dlp or web-based download managers often save files with these types of alphanumeric strings.
: When exporting media from a database (e.g., Evernote or Instagram), files are frequently given randomized names to prevent overwriting existing data. 0h642mla4el8lb7w29cby_source.mp4
: MP4 (MPEG-4 Part 14), a universal digital container for video, audio, and subtitles. : Tools like yt-dlp or web-based download managers