I will try with spdif later on. I have emailed them, and regarding the YouTube video they can't answer because they can't access YouTube in China.I really do agree they really need to improve with their software. I've never had any problems before with foobar before. I switch back to my older DAC and there is no prob. Even playing at default settings gives the same result. It happens to browser video, all players and also games, so I suspect its software error. Or it could be my playback device settings?