Hey, why is that my ipad2 takes such a LOOONG time to stream videos from youtube, 90% of the time... Even when i have full wifi strength?

It helps to let them fully or at least mostly que up or load first if that makes sense. Have you verified that the connection is in fact truly excellent? If possible, try another device using the same connection and verify its performance. I've noticed that the highest res YT vids take a little bit to load but once they do they work good.