FFmpeg on the command line on Windows has been fine for me every time I use it, using the Zeranoe builds. They seem to come with the right codecs and everything.
Breaking your laptop's boot list will happen more often with it mounted RW anyway. So it's good it fixed it for you, but I doubt the number of cases it's fixed something/been useful outnumbers the cases where someone bricks their system using what is probably the most repeated Linux command on the internet: rm -rf /.
This is super nitpicky but it's "Bitcoin" when referring to the currency (e.g. "the Bitcoin blockchain") and "bitcoin" when referring to an amount ("0.2 bitcoin"); it's never "BitCoin".
Side note: as a teenager, I'm pretty sure this "on fleek" phrase everyone's touting as "the new cool phrase all the kids are saying" is a red herring to spot when people are trying too hard to be cool or something. I've never heard anyone say that in real life.