I spent quite a lot of time advocating the use of segments for media over the last few years. A lot of the detractors would say "but nobody uses chapters" - which I always thought was a rather narrow minded idea of what a segment can be. YouTube got it (mostly) right, they've got simple tools to make chapters in videos with timestampsp in the description. But that's just the start... https://www.youtube.com/watch?v=xMW3TFKYFtQ
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