It upsets me a little because as you said, my only purpose to show the video was to collect and to archive Rayman related goods, not for personal profit but then, law is law, and the author of the video has got total rights to claim if he doesn't want the video to be seen publically. Like this I can already warn everybody that if you are doing a similar thing, please delete the videos before you get a similar surprise, I already deleted other videos similar to the claimed one.
It wasn't the E3 trailer thing but it was the one with Rayman and his wierd look, along with a human person.
Honestly, the author could have talked with me in private that I would remove the video anyway, it wouldn't be necessary to reach this point.
EDIT: Fantastic, apparently because of this I can't upload videos with more than 10 minutes while this warning is still up. It will expire in 6 months so I can't do walkthroughs until around 1st May (and it would be difficult anyway to start to do the RL walkthrough before that).
Concerning the deleted videos, I still have them archived on my computer but I just can't show them publically anymore.