I don't have a Media Link HD so I can't speak to what works or not, just pointing out what worked in that video and notating that it was on a One X as opposed to the Evo 4G LTE. I know that since the Evo 4G LTE and HTC One X have different software builds, things can differ. I know little to nothing about the MediaLink and I'm just as confused as the next guy. You have an Evo 4G LTE and the MediaLink HD and you tried the home button and it didn't work so you know better than anyone. You are not missing anything. Try the 'recent applications' key. It is a wacky idea, but I'd also try the camera key.