Then you can and should post screengrabs from videos in such instances to avoid getting into bother.
Seeing as James has already answered your queries for that one, the link has been removed. But that's another reason not to do it... because it gives threads a very short shelf life if the links can't remain up for more than 5 minutes for one reason or another.
Whilst you are the one asking for the IDs because it is of interest to you personally... this is done in a public place which means others may be interested to learn the answers too after they have seen it. The idea of marking posts as the solution is so that everyone can see what the answer is in case they were interested to know themselves, but those who log on later may then find that they can no longer visit the link that was once there after the answers have been posted. Other users may have subscribed to the thread in anticipation of the answer being posted, for example. And if the link has disappeared by the next time they log on... they'll have lost their reference point. And those who are looking at the thread for the first time after all this has happened won't even have the opportunity to see it at all... which like I said, kind of renders the thread useless to everyone apart from yourself.
So if you do things right from the get-go then everyone's a winner!