youtube-dl-gui is a video streaming downloader. This program simplifies the youtube-dl application by rg3, and gives it a user friendly interface for downloading from websites. May require ffmpeg(put ffmpeg.exe and ffprobe.exe in same folder as youtube-dl-gui.exe).
https://www.videohelp.com/software/youtube-dl-gui
https://www.videohelp.com/software/youtube-dl
youtube-dl is a small command-line program to download videos from YouTube and a several more sites(like Facebook, Twitter, Vimeo, NBC, ABC, CNN, FOX NEWS, etc, see supported sites). If you don't like command line software then get a GUI like youtube-dl-gui. Or from the command prompt just type youtube-dl.exe https://www.youtube.com/watch?v=x8UZQkN52o4 and it will download your youtube video.