film within the film

I would guess that it isn't. The film quality and everything blended with the rest of the movie. And it seems appropriately spoofy.

I did accidentally kill her father when I went to pick her up for the first date. AWKWARD!

I certainly do not think it is.

It's that man again!!

I imagine that was action footage taken from one or more scenes in a previous film or films, edited together into an over-the-top sequence.