Hi ReBoot,
I can confirm switching between channels should work without having to unplug and plug back in the source, I have successfully tested this using VGA and then tested again using HDMI on a HP ProBook. Just to check, have you tried this on other make and model of PC/Mac sources?
Re: YouTube - The only currently known way to play YouTube videos on the V series built-in Android is by going into the settings of the Browser-->Advanced-->Set User Agent-->andorid 2.3 useragent.