In the URL of each YouTube video is the 11-character video ID, unique for each video. Can they ever run out? Just how many videos can YouTube handle? To work it out, we need to talk about counting systems, and about something called Base 64.

Want to know how the single camera shot was done? "Matt Bought a DJI Osmo and It's Surprisingly Good" is today's video over on the Park Bench: https://www.youtube.com/watch?v=Dyy41yAs8nc

I'm at https://tomscott.com/
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or on Instagram as tomscottgo.

Filmed by Matt Gray, who's at http://mattg.co.uk
or @unnamedculprit on basically everything everywhere.