Lego first introduced Batman legos back in 2004. Before they did that, I used to really enjoy watching a Batman animation someone had made using custom minifigures. I think it was called “Batman: Revenge” but I could be misremembering.
The villain was the Riddler. His face was a yellow smiley face with sunglasses and he wore a top hat. There was no dialogue. The plot showed the Riddler repeatedly kidnapping people and putting them in some sort of electric chair or something, a lid would close and their head would be replaced with a skeleton head. In the end, Batman put Riddler in his machine and he died.
I can’t remember what site I watched this on, it would predate youtube