Anime Eyecatch : The Great Showcase

Oh man. This would be really interesting with a much longer video that actually examines eyecatches over the decades. You could identify patterns, trends in what studios thought were good and pick out interesting things I doubt anyone has really examined from an anime-history point of view.

You could then spin it out into a series because you can do the same thing for lots of different parts of anime other than eyecatches. Even for specific trope-scenes too. How many different ways has x joke or common scene been done in anime and how has it evolved over the years? That kind of thing.