Unironically Skibidi Toilet is kind of great. It's brimming with lore and creativity, made by free-to-use software, and is infinitely better than the likes of Fred (which is what kids were watching when I was a kid).
Since I'm hating on old Youtube, a quick shoutout (derogatory) to Happy Tree Friends for being made by edgelords who wanted to combine Saw with cute children's cartoons. Great for Youtube! In fact, so great that at one point they actually partnered with Youtube to make instructional videos for new creators.