Damn SSL/HTTPS has killed many options, including my ability to YouTube on my PowerBook G4. I can browse some SSL secured sites, such as my podcast favorite Go Vegan Radio, and BuggiesGoneWild Golf Car Forum, but forget anything like Youtube, not even Metacafe works today. Metacafe I once used when Youtube blacklisted Netscape and IE 5 in 2010. It used to have an URL trick to pull in YouTube streams and at that time was the only non-HTTPS site.
Google really dropped the ball in 2018--until then, the old Youtube 2.x app on Android would pull up stuff even stuff Google purged--you could still find tv shows, movies that were not visible on modern Youtube. The old iPad Youtube app worked too, but then they killed whatever server it used.
The oldest device I can Youtube on is a 2012 Galaxy Note 10.1 tablet. I sadly haven't found a used iPad 2 online that isn't already updated to iOS 9, and iPad 1's are extinct.
My PowerBook has too slow a CPU and too little RAM (literally 128MB) to do much other than Google or forums/podcasts. I can't find any compatible RAM. The last two sticks I bought were supposed to be compatible, and fit the slot, but the laptop just went 'beep beep beep' over and over and produced no screen until I removed the RAM. I don't know what it's compatible with but if only I had enough to run 10.4. It requires 256MB, and although people say it will work with less, the installer disagrees.