"Everything hurts me". Pretty much.
The "Teens React" series always seems to be at its best when it's dealing with a generational divide in video games, as kids brought up on gentler, perhaps more collaborative games are sat down with a brutal-as-fuck platformer from the 80s. Like, in this instance, Mega Man.
Mock the deaths if you must, but there's some nice reflection (and takes on changes in game design) at the end. For a game that just kicked their butts, they're surprisingly up-beat about the whole thing!