This video likely worked due to its use of a popular joke format (a riddle with a punny answer) combined with the inherent appeal of puppets, which can be engaging and humorous for a wide audience.
Summary
A puppet asks the audience "What do you call a $2 chicken?" and then responds with "Back back" as if it were the answer. The video is short and uses text overlays and a puppet to deliver a simple joke.
Structure
1Puppet asks a question about a $2 chicken.
2Puppet pauses, then answers its own question with "Back back."
On-screen text
WHAT DO YOU CALL A
2 DOLLAR CHICKEN?
Transcript
What do you call a $2 chicken?
I don't know what.
What do you call a $2 chicken?
Back back
Original caption
WHAT DO YOU CALL A $2 CHICKEN? 🐓 💵 #chicken #chickens #kidjokes #dadjoke #dadjokes