https://www.vidyard.com/blog/video-chapters-youtube-vidyard/
Adding video chapters makes your content more digestible and SEO-friendly. Learn how to add chapters to your YouTube and Vidyard videos.
add videochaptersyoutubevidyard
https://github.com/SublerApp/Subler
MP4 muxer and editor, can add tx3g subtitles, video, audio and chapters tracks compatible with QuickTime - SublerApp/Subler
githubmuxereditoradd
https://bunny.net/blog/you-can-now-automatically-generate-video-chapters-in-bunny-stream/
Create searchable, viewer-friendly video chapters automatically with Bunny Stream transcription.
add chaptersvideosbunnystream