My sister's friend's older brothers got me started by showing me some websites and funny videos.
YouTube did not exist so instead I got my fix from Macromedia Flash. The main websites that I browsed included well-known ones like Newgrounds (still kicking btw) or AlbinoBlackSheep to trashier places like Ebaumsworld and FunnyJunk. I remember videos like "Ze End of Ze World" or "The Ultimate Showdown".
These weren't the only websites available; the internet was less centralized so there were sites aplenty to watch flash videos with some having me question how the hell my elementary-school self discovered them in the first place. For example, the early 2000s were not a good age to be a stick figure. I remember places like sticksuicide.com or something where you can do a vast array of terrible things to the poor stick people ranging from accidents to executions. There were of course flash videos of these stick figures which could better be described as snuff films. I remember a series that can be seen on YouTube called "Joe Zombie". Try to see how many episodes you can endure before the Shadow-the-Hedgehog edge cuts you too deep.
Just like today, there was nostalgia for the good-ole days even in 2004. A common flash video theme was 16-bit or 8-bit graphics. Instead of psychopathic violence directed at stick figures, you could go berserk on Nintendo characters. There was a game called "Super Mario Rampage" where you're just Mario with a double-barrel mulching the inhabitants of mushroom kingdom in world 1-1. There was also this video themed around The Legend of Zelda 2 where Link goes into all these village houses to bang the women and the video ending in an argument about child support or something.
Other twisted flash games included "Kitten Cannon"....Actually, I'm not sure if I'd call these games. They were more like some macabre curios in the digital space.
I want to emphasize that these flash sites weren't all just childish shock material. Content was never monopolized on a single website and instead was scattered across the web in these small platforms - some more darker than others. There were some genuinely cool but innocent places to discover with people sharing their creations and their feelings of nostalgia for the 8-bit/16-bit eras. I was too young to feel nostalgia at that time. I wonder if the creators of these flash videos would ever think that people would have nostalgia for their works?
Unlike some people on this board, I did get in trouble with my parents. My father found my browsing history and to be honest, I'm not sure if I'd rather find my 8-year old watching porn or find him enacting atrocities in a stick figure execution chamber.
Edgy Gen-X themes were on a different world compared to what we have today. The internet back then was cool.