you might try right clicking on the video and see if you can select "save video as"
to download the video as MP4. there's a setting in firefox to enable right clicking or you can use a browser extension.
october262
October, so simple. It makes sense after Germania pointed out that they were just MP4s. Sometimes you get in a habit of doing something one way and you miss the obvious right in front of your nose. If StreamFab can't handle a certain non-DRM video I immediately load up Tubedigger or IDM as an alternative. If I had been paying attention I would have noticed that they were MP4s just sitting there ripe for the taking.
Cats4U
Yes the first thing you should always try is right-click and save video as... But it doesn't always work even for non-drm'd videos. This is really to stump non-tech people. I actually do that on my wife's website since 95% of her clientele is old ladies. It's simply adding the attribute
controlsList="nodownload"
to the HTML5 video. It can also be done in jwplayer and several other web players.
In any case, there are a gazillion ways to get those videos but StreamFab isn't one of them because there is no real manifest to download or DRM to remove.