I can't get media rippers to work on Chrome, due to all the security shit I have packed into it. I only use Firefox for ripping, and I only rip with Firefox.
I use and recommend Flash Video Downloader
I use it to rip video from sites including xhamster, xvideo, pornhub, redtube, youjizz, hardsextube, youporn, userporn, 4tube, and others.
Haven't tried naughtymachinima explicitly, but seeing how it works on all those other, it should work fine for you.