David Mitchell's point is different with respect to this one. Although both valid, he argues that living in the moment is not possible whereas the video is saying that we're kind of not living in the 'here' but somewhere else.

On the topic of the video it's suggesting that we all spend far too much time on our phones. This is probably true but the time that I see people doing this is when there's nothing better to do, like on mass transit or waiting in line. Which seems fair enough to me.