in ME TVs promo for this, when Andy sings "Andy & Barney were lawmen..." is that from an episode? If so, which one?

Also they used to show another scene in the promo where Barney's talking to someone and says "To sum it up I guess you could say there's 3 reasons why there's so little crime in Mayberry. There's Andy (they show a pic. of Andy, there's me (they show the ME TV logo, then Barney pats his gun and says "and baby makes 3."

What episode is that from?

I know the episode you talking about where Barney sings but i don't know the episode name.

but the other is from season 2 episode 7 Crime free mayberry

https://www.youtube.com/watch?v=mdwyvytIfMQ Youtube episode