PS3 Freezing

My PS3 has decided to start freezing now.   The odd game would freeze.  That was know big deal.  Ever since I watched a Blu-ray movie and it froze my PS3 has not been the same since.  I let if sit for a day or so and put a game in and it work for awhile, then it froze.   I went out and bought one of compressed air cans hoping that would fix it.  That didn’t work.  So I did some internet searching and came across a video on YouTube that might help.  Going to give that a go.  If that works or doesn’t I’ll make and other post.