Not the thing to ask... That said, look on torrent sites, some great uploads are there, blue ray rips to just standard r5 rips (poor quality). I doubt someone on youtube would upload the entire thing part by part.
There are some other sites that host free stream movies but the quality is very low your better of downloading via torrents
http://www.movies-links.tv/movies/terminator_salvation/ I've used this place tons in the past. They only host links to other sites though as to stay out of the spotlight for legal purposes. Just find the one with the best percentage of liked. There should be a few DVD rips available at this point, so you should be able to find a few links that are relatively good quality. Beats downloading the movie if you only want to watch it this one time.