You should make sure you have all the info before commenting that way. There is now a DRM protection for DL that content creator can activate which prevent all the previous DL methods.
sorry for my ignorance but I know that right clicking does not bring up a menu BUT shift + right click does (at least on my purchased videos) cant you do shift+right click on these videos, select open video in new tab, then right click --> save video as...
I would assume this was tried tho.