I concur about rechargeables - it doesn’t seem common for devices that take AA or AAA to have a battery gauge and it would be nice to be able to check the level on my rechargeables stock so I can know if I should top them off without needing to put each of them into the charger.
Not sure about Facebook since authenticating for private videos is a hurdle, but for my partner who uses a mac I downloaded open video downloader which is just a foss GUI for ytdl, it also keeps ytdl up to date which is a requirement for me since I don’t want to be called when it stops working. I think on windows you have to manually install msvc2010redist but besides that it seems to just work out of the box.