I read on Google that when downloading 'YouTube Video Downloader",
there is malware attached to it...

I have a free software program called 'Malwarebytes'.. I ran that software
and it found the crap that came with YouTube.

I clicked on the crap that malwarebytes found and those items were quarantined
and removed from my computer.

I run Malwarebytes at least once a week to keep my computer clean as possible.