I posit this completely made up definition.

Shark is an adjunction of two words

Sharp; because, well look at them

and Ark; because they are boats.

Sharp-Ark > Shark

Isn’t language funny sometimes

If you have the option of hosting it somewhere else have a look into OBS.

It’s open source desktop recording software.

A little more technical than Loom but if you get it going it will serve you well