Concrete is cement plus aggregate (it doesn't have to be sand; it could be gravel, for example). Coarse aggregates wouldn't work well in this, but it would be cool for a followup video where sand is used.

The wikipedia pages suggests that this is more prolery referred to as "foam mortar" or "foam cement"

https://en.wikipedia.org/wiki/Foam_concrete

You could say the aggregate is air and the cement still performs its role as a binder, it binds all the air bubbles into a stable matrix. Hence "aerated concrete".