Aren't Dinosaurs Extinct?

It seems that no one in the scientific community has the courage to actually say what i am thinking about finding soft tissue of dinosaurs in fossils thought to be millions of years old and some DNA fragments as well.  What I am asking is, are you sure that the fossils really are millions of years old and no just perhaps 10's of thousands or even thousands?  I have a short video on this subject on YouTube called Dinosaurs Still Alive Arent They Extinct.