It wasn't in "Clerks". But since you mentioned, I paid attention to the title of the video.. "From original clerks". Looks like it was cut.


No, that scene actually was in the film. Right before the Dante and Randall have their infamous exchange about Return of the Jedi.
 
lol.. Where is it from? I'm kinda fan of Jay and Silent Bob.. :)
...... Evidently, you're not.

Semi-related: I've always thought about doing a guitar and drum backing with this guy singing. Gallops on guitar, power chords on "BEL-ZUUUUR-KUUUUUR", etc.