Edit: so there is no much interest from maritime biology.
Unless it's for oil very few bother surveying under those bodies of water.
Note also that one of the divers in the video is silting badly towards the end. I don't think that those are professional archeologist divers in the video.
Not many of those scans are public, but sometimes researchers are tipped off where to look for wrecks.
It was the Dardanelles (the Bosphorus is quite far off, though just as important).
You can (as usual) read a bit and find some starting articles on the wikipedia page: https://en.wikipedia.org/wiki/Dardanelles
Many also believe that there is an uncontacted civilization under the Atlantic ocean, unseen apex primate cryptids in the Himalayas and the Pacific Northwest, and a Paleozoic reptile in a lake in Scotland.
“Whoever controlled Troy, or Gallipoli for that matter, could control all maritime traffic between the Aegean and Black Seas. The wars, in other words, were fought for money and power, not for a woman named Helen.”
That’s the reason I said “many believe” and not “it is proven”. I didn’t even claim it as truth. Not every reply is supposed to be a PhD thesis so please don’t be a dick.
If anything “many believe” should nudge you to do your own research.
Or you can complain about “fake news” or “trolls” or whatever is the phrase du jour to discredit strangers over the internet.
Perhaps fifteen feet?
"... where it appears to have lain undisturbed for more than 2,400 years."