I don't doubt their intentions, but their execution leaves a lot to be desired. The Youtube app used to have a setting where we could make it only show videos only in low-res mode. It's gone now, and family members who are not tech-savvy use up a good deal more of the monthly download limit than they used to.
It seems that since the Google+ integration fiasco every single "improvement" YouTube introduces is a step back.
I'm surprised that it needs WiFi in order to share.
If your friend is already on WiFi, why can't he just stream from YouTube?
Because a local wi-fi network isn't necessarily connected to the Internet? Or only with a very very slow connection?
You can share things downloaded earlier, through another, faster connection.
I miss watching all uploads of a channel chronologically