I just finished watching (via the Kanopy streaming service, free through my local public library) the Great Courses series of 24 videos titled, "The Great Tours: Greece and Turkey, from Athens to Istanbul"). The course is also available from The Great Courses company itself. TGC offers streaming for a monthly fee, but there's also a free trial period. These videos averaged about 31 minutes each.
As always, the lecturer is a college professor, in this case a professor of archaeology. The course was excellent but it is, as one might expect, very heavily focused on ancient and classical archaeological sites, especially in Greece. The Turkish segments (about 1/3 of the running time) extend into the Byzantine period and later.
I am not much interested in ancient/classical sites (an understatement), so I didn't find the Greek content terribly worthwhile for myself (though, again, it was well-presented). But for the more typical tourist heading to Greece, I believe the course would be very worthwhile. I took a lot more notes from the Turkish episodes, partly because I was just less knowledgeable about Turkey to begin with.
One quibble: the closed captions defaulted "On", and I saw some blatant errors before I eventually turned them off. Most were just homonyms (most frequently "sight" vs. "site"), but "Ataturk" was twice rendered as "Atat", and one reference to the island of Paros showed up as "Piraeus", which could be problematic for the uninformed. Overall, the captions were too good to have been machine-generated, so I was surprised to see all those errors creeping in.
I've been dipping into the another Great Courses travel-related series, "The Great Tours: England, Scotland and Wales", and it is not so single-mindedly focused on one particular type of tourism.