Discord's media display stack seems to be broken (for lack of a better word) in some very naïve ways. For example, embedding files with the ".gifv" extension (u

Discord's media display stack seems to be broken (for lack of a better word) in some very naïve ways. For example, embedding files with the ".gifv" extension (used on several popular websites to denote gif-like animations which are encoded in a modern video codec) doesn't work, even though they're valid video files expressing a webm or mp4 mime type. It instead displays a static image, which means they're reading in the video, then generating a thumbnail and ignoring the fact it's a video.