Hi there programmer. So you need to download a YouTube video? Why use savefrom.net or Vidmate when you can use YouTube-DL, or DLP in this case. You simply need to go to the Github, and find the download link for your OS:
After downloading the binary, and moving it to path, (/usr/local/bin for mac or Linux, just add to path environment variable for windows), you can then run it like:
yt-dl -o my-video.mp4