If you're looking for the best tool to download YouTube videos, look no more, you came to the right place: 4K Video Downloader
You can download almost any YouTube video, as well as many facebook videos, completely for free! You don't even need to install the program. Just decompress the archive somewhere and start the program. It's that simple!
Simply copy the link of the video and you will immediately notice that the tool detected the link and shows a youtube icon on the "Paste Link" button:
Once you click the button, you will be shown options to choose the resolution as well as the format. Here for example you can choose between MP4 and MKV, and up to 4K!
And once downloaded, you just need to double-click on the title to start playback on your default media player.
I usually take the MP4 format as it is the most compatible, especially with the PlayStation 3 and PlayStation 4.
Only downside is that some YouTube videos, that require authentication to be played, may not be downloadable at the moment.
But as the tool is being updated regularly, we may see a fix for this in the near future. Fingers crossed! :D