Wouldn't you love to have all of your favorite YouTube videos on your hard drive so you can watch them offline? Sadly, this ad-supported download won't do that for you consistently enough to be worth recommending. When AllTubeDownloader does put a file on your computer, it's often of very poor quality.
Sometimes, this program can't even take you to the main menu without crashing. It takes a very long time to load -- so long that you'll try opening it again and the program will give you a very annoyed-sounding error message. Once you make it to the actual program, the layout is quite pleasant and user-friendly, except for the annoying ads. You can pay your way out of those if you want, of course. You can paste the URL to any site and choose your output format right away. AllTubeDownloader will offer to add a browser plug-in for easy converting too. However, it's really putting in a spammy plug-in that you'll want to uninstall the second you see it.
This program offers plenty of promises but doesn't really deliver on any of them. By the time you load the program and download the file, even the slowest of connections would have loaded the Web video. AllTubeDownloader just doesn't perform quickly or smoothly enough to match up with other YouTube downloaders.