I got an old Mac OS X PowerBook G4 from someone. I used to be able to watch YouTube videos on it but I think I uninstalled something vital to do that on accident and now I can't anymore. I think I uninstalled something of Adobe but I'm not too sure. I tried reinstalling Adobe Flash Player and the download completed but then when I tried to watch a video it said missing plug-in. i clicked on the Adobe Application and pressed open but then it says " Adobe Flash Player cannot be installed. Devices with PowerPC processors are no longer supported. Click below to download the last version of Flash Player for PowerPC." So when I tried to download that, I kept getting the same thing and it's results. How do I fix this or undo what I did wrong?