To get the most out of the Internet Archive, respect its mission. Use it to discover films you cannot buy anywhere else. Use it to watch movies in 1080p without a Netflix subscription. And if you love what you find, consider to the Internet Archive (it costs roughly $0.02 per book per year to store).
You can find these high-quality movies by searching the archive specifically for terms like "1080p BluRay" or "BD50". blu ray movies internet archive