Same use-case, we used to rely on system libraries but the video codec support is all over the place on each platform, and developers would test in their main platform and ship to others without fully testing and have a broken video near the end of their games because WMV runs on Windows but not on macOS, or the audio of the video was a variant of AAC that didn't run in the web port in some places and a bunch of other random differences between platforms to the point the only reliable way was to cut system video libraries and make sure all platforms have the exact same codecd. But then it turns out there isn't something better than Theora or mpg-1 without making the game player have 10x or more in size - the game player is around 3MB unzipped.
