In case the vids below won't play, try this one:
https://www.youtube.com/watch?v=vFBdqDry9MkFirst 10 mins or so of the movie are meh. It gets much better, after that. Very different take from the 1st book, fills in the gaps which Herbert assumed but didn't cover. Sometimes the acting is brilliant, sometimes lackluster. It has less gore and more meat than the first version (with Jurgen Prochnow, one of my fav actors). So is a good alternative movie. Very slow, though. On Purpose. Nearly three hours, and there is no part 2. It will play in here, so don't be fooled by the grayed out icon.
https://www.youtube.com/watch?v=ueYYVRTWmjYThis is Episode 3. The total is still less than the Directors Cut for that first miniseries, but should be the same as for the original miniseries.
https://www.youtube.com/watch?v=tjhrNKQX29U