FFmpeg is likely the backend of YouTube through reverse engineering: https://streaminglearningcenter.com/blogs/youtube-uses-ffmpeg-for-encoding.html (archive)
- FFmpeg | 144, 194, 2
- Multimedia software | 0, 214, 5
- Software | 0, 21k, 426
- Computer | 138, 33k, 747
- Information technology | 0, 33k, 759
- Technology | 0, 52k, 1k
- Ciro Santilli's Homepage | 262, 238k, 4k
- Fabrice Bellard | 226
- YouTube | 395, 804, 10