[pests]

A lot of trust they don't keep a map from hash->id behind the scenes though for data they already have.

Hell, a YT ID is 11 characters in a base64 character set. While a lot of possibilities, I do think the entire domain can be precomputed for some amount of costs.

[emodendroket]

I didn't say it was a wonderful or even good scheme; I said it was the best I could think of.