Congrats on getting MintPPC installed on your imac, your perseverance is admirable . You definitely need some more RAM, unless you are one of those people who love to see how low they can go and still boot.
You ask about Flash, and there are many posts on this forum with this question, but I thought I'd summarize here for you:
There is no Flash for Linux PPC. None, never will be. There are two open source Flash projects, Gnash and Lightspark, neither of which work with mintPPC at this juncture. To view youtube video you have a few options, but your imac is kinda slow for some of them. Minitube is a godsend for mintppc, but likely you will not be able to use it with a 400mhz G3. There are some extensions for Iceweasel, flashvideoreplacer and downloadhelper that may be of help to you. Flashvideoreplacer will use gnome mplayer to play flv files, you will be the happiest if you stick with 240p. I can't promise it will work, but with some more RAM on board it might. Downloadhelper enables one to download flv and mp4 files from many sites, and you can play back in VLC or gnome mplayer. VLC is pretty hard on older machines I find.
There is a way to download and play youtube from the command line in mplayer without a GUI, that likely would work the best with your machine. linuxopjemac told me how to do this, I tried it once but my ibook G4 can handle the above methods so I didn't memorize it.
Welcome to the revolution.
Hey Thanks ocmac!, I actually found the Minitube player but, I was actually just checking to see if pogo games would load on it just for the fun of it, the first time, I was going to a solitaire game, it told me I needed flashplayer, but I went back a second time and tried a slot game, it didn't fully load but, it's NOT flashplayer I needed anyway, and I did not think Pogo had changed, and I was right. Pogo games use the Java Runtime Environment, requires a plugin for Iceweasel, I'm gonna search in the forums about it but if you know of one that works, I'm all eyes.
Also, yes, I do need more RAM, This was just my first attempt at doing this and iMac was free so I figured I'd see if I could do it
If you have specific suggestions about what I should add.... well you know all eyes blah blah. Oh yeah, and that iMac is kinda slow but then again so is our Broadband (Satellite Only Available Here 1.5M down / 256K up), unless I wanna pay $695/month for a T1 line and that would just fix the up (1.5M both ways) from what AT&T told me. I live in the wilderness but it's pretty!
Thanks again for the welcome and all the help everyone!