I didn’t realize this and it may be an anomaly. I was looking on YouTube for a copy of the original TV trailer for Star Wars Episode IV. When I got there, I’m not sure what I keyed into the search function but I ended up finding full versions of the all the films!
I’m not going to provide a link as I don’t want to end up in cell block AA-23 but if you go to YouTube you’ll be able to watch any of the movies you may have missed.
It’s also a great place to look at homemade Star Wars movies from fans around the globe. Some of the lightsaber duels are incredibly well put together for a bunch of amateurs. Just do a search for lightsaber duels on YouTube.