Full-length public domain Westerns, such as the 1935 "Born To Battle" and 1934 "Wagon Wheels" movies, are freely available on YouTube. Short clips and trailers are also widespread. As of 2015, recent full-length movies are also accessible for a fee, including the 2011 "Cowboys & Aliens" Western.
The BestPDMovies YouTube channel hosts full-length, legal Westerns, including "The Arizona Kid" with Roy Rogers, and "Angel and the Badman" starring John Wayne. "The Proud Rebel" and other legal Westerns can be found and viewed by searching the website.
Full-length Westerns are sometimes uploaded as multiple YouTube videos, due to limits on unverified accounts. TechHive states that many movies are uploaded illegally, so it is important to respect copyright law whilst using YouTube.