download assistant for Firefox works, but you have to pick the one that isn't the ad, but is the right movie.
Pain in the ass since it's numbers and you have to guess blind, but I just try to download all the ones listed and delete the short ones later.
Take note of the last few digits so when you check, if you got the wrong one, you can try a different set of numbers. The numbers remain the same for each vid.
To reduce confusion I usually only open one at a time, whereas other sites can open the lot and download as many as I like simultaneously.