Who are Canadian politicians arguing to?

I sometimes see clips pop up on YouTube shorts of Trudeau and Poilievre arguing back and forth but their focus doesn’t seem to be on each other but looking in the same direction, occasionally looking at the other when taking a shot.

Me as a non-Canadian, I’m not familiar with this. What exactly are they doing and who are they directing these to? Is it one person or many others or is it to be in general to the Canadian population?