Many years ago, "8088 Domination" demonstrated full motion video on the original 1981 IBM personal computer:

https://trixter.oldskool.org/2014/06/19/8088-domination-post...

As it turns out, the video was encoded in such a way that it could be played back using the display bandwidth of the original PC, BUT doing that encoding required a modern computer to perform in a reasonable amount of time.