Any video or books that will improve your chess basics and chess general principle understanding will do.
Because he loses...
He should have understood that a comment like this just invites an abusive response. Anybody who claims that they can't see that must be either stupid or trolling.
What you should have said.
Tactics daily and analyzing your games. This is what I'm doing to improve. It takes time, but so far I'm seeing progress. Keep at it!
I love you Grendly
@einstein - we all love her dearley
Thanks to all who responded. I specifically liked the "aww-rats" suggestion and the anti-blunder suggestion.
I know your above 1200 now, but I think you could benefit from GM Igor Smirnov's videos. They're great!