问题
I'm using YouTube iFrame API for controlling YouTube video in my page. Biggest problem I have is with live streams which I can't get exact duration, but the biggest problem is some kind of a buffer window.
For example I have a stream that is 3h long, but when a user comes in after 3 hours, he can only get the last 2 hours of the video. So first hour of the video is not accessible to the user.
Does anyone knows why? And how can I get that "time window" length? Because in couple of videos that time window was 2h and in some 3h.
来源：https://stackoverflow.com/questions/35606957/youtube-player-api-live-stream-duration