I'd guess it's the bandwidth and compared to a GIF, you can pause them. While it's not usual to copy text from it, I've done that once this month and thought it

I'd guess it's the bandwidth and compared to a GIF, you can pause them. While it's not usual to copy text from it, I've done that once this month and thought it was neat to be able to do that. I do believe that they have an advantage over video/GIF.