When I add a video to my page via Embed code, I also have a descriptive text below it - and sometimes I refer to the video with timestamp position. For example "Demonstration on how to [blah blah] on 20:34. The problem is, the users need to manually go to that position. In a longform video (5 hours), its very difficult to go to that exact point in time. You can see this in action in youtube comment section - when you press 3:45 it goes there in the video.