I have seen this. At mo' I don't have the 720 libs installed but use kp52 and dsp setting. When issue occurred all videos gave the error. I thought that the gpu had become unstable due to a vid at the top end of capability and a reboot sorted it. That message crops up normally from time to time due to vid exceding spec, or so I think....

Freemangordon made this point about the gpu in relation to his dsp work and the 720p libs. Is it valid elsewhere?

PS I have also noted GrimyHR's point from above: some vids play fine downloaded but not streamed.