In the Ten Minute Power episodes, there are some episodes where they eat. The audio is often turned up or has exaggerated sound effects added in to emphasize it
During their Dark Souls 3 playthrough, there's a boss in the game that's a type of dragon that's killed. Yes, yes, I know Dark Souls as a whole has a few dragon bosses and is listed in this category as well, but just in case, I'll confirm that yes in at least one Let's Play, there is a dragon death.
Arin "hangs himself" offscreen at the end of the Teletubbies episode and we hear him graphically pretend to choke. Some other episodes also employ choking sounds for comedy.
'Ok Dennis, I'm sorry I yelled at you. As an apology, I'm gonna learn ya how to play buttball. First rule: never tell ya parents. Second rule: NEVER! TELL YA PARENTS!'
The Teletubbies let's play ends with Arin freaking out and pretending to hang himself offscreen. We hear the audio of him supposedly suffocating to death.