Their iframe API is quite simple if you know basic javascript.
developers.google.com/youtube/iframe_api_reference
You might not need actually that, as you can pass a start time to their html embed script.
You'd have to write a script to calculate how many seconds someone is after the start time, so you can pass that to it.
I think this does most of that.
(
monkeon schmonkeon, Mon 8 Jul 2019, 9:19,
Share,
Reply)
