Youtube-dl is a very useful command-line tool that lets you download videos from YouTube and some other websites. Using youtube-dl is not that complicated but I understand that using commands for such tasks is not everyone’s favorite way.
The good thing is that there are a few applications that provide GUI frontend for youtube-dl tool.
youtube-dl is an exceptional tool for downloading videos from YouTube. If you don't like using the terminal, here are some GUI apps built on top of youtube-dl.