Decided to dip my toes in so I followed the guide to a website where I can download some content via google drive. Like an idiot, I didn’t research the risks of direct downloads before and so I’m now a bit paranoid. I understand the chances are low and my media player needs to be exploited but is there a way to be certain? A post on reddit said to use mkvtoolnix to check all the elements but I honestly don’t know what to look for. Any help?
Run a live Linux from an USB, and try to play the videos from there. If some files don’t open, I would be a bit worried that they might contain a virus. You can also try to retranscode them with ffmpeg, not sure how this will work with infected files though, but maybe worth researching.