Some of you might remember when a 3mb flash animation could pack in some 5 minutes of animation, with the more advanced ones even having chapter/scene selectors, which could also include clickable easter eggs and other kinds of interactions during the scenes.
Streaming video killed whatever Flash was.
Flash took the binary categories of animation and video game and made it into a spectrum. Even when they were mostly animations, there would be some interactive elements. It was apparently a technical horror show, but it was used to create unique pieces of art that define a narrow era.