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This is the most intense tsunami footage I've ever seen. It purportedly shows the tsunami from the 29 July Mw 8.8 quake in Kamchatka, Russia, filmed in that same region. Source: seismic.kiwi on TikTok, although I've seen this video all over the internet and may originally be from VK or Telegram.

The sound is also dominated by mid-frequencies, but I presume the actual noise here would have been almost deafening. More to the point, this video demonstrates that tsunami aren't "waves" per se, but enormous volumes of displaced seawater seeking equilibrium. At whatever cost to the coast.

Some people say 'why go walk there', well there is a small settlement at this bay. Fortunately that is up on the cliffs...

It's literally the whole damn ocean sloshing over the rim.

What are the factors that make you think this is a tsunami rather than “just” an (admittedly very impressive and destructive) coastal storm?

The big-ass earthquake was the factor. Look it up: 8.8 magnitude Kamchatka Penninsula.

Yes, there was a big earthquake off Kamchatka recently, and yes, it caused tsunamis. But how do we know this *particular* video was taken in Kamchatka in the aftermath of the earthquake? And how do we know it shows a tsunami rather than some other kind of wave?