1. there is a movie site tied in through the library called Hoopla.
https://www.hoopladigital.com
go to the Library site, and it should be listed.
I use my library card to get free movies there.
2. Overdrive (library too) leads to free books and apparently free movies…
3. VLC: a program for viewing films without the DVD.
This is where I found the program (s) that worked well for me:
http://www.videolan.org/vlc/index.html
If you have a DVD movie, and save it to your computer, then you can view the movie on your computer without the DVD.