[erric]

So called odd meter time signatures are not “tricks” and labeling them as such is a bit of a stretch. Most music is composed in 4/4, four beats in a measure with the quarter note getting the down beats. It’s so often used it’s called Common Time[0]. But there exists many other meters in most genres of music. Do you want fifteen beats in a measure with the eighth note getting the down beat? No problem!

In this video Harry does seem to do this on purpose as a little musical joke with the audience, and I’m sure that’s what the title refers to.

[0]https://www.britannica.com/art/common-time