Russian war correspondent Eugene Poddubny from  Rossiya 24 TV has posted news footage taken with a quadcopter drone while embedded with with SAA + allies over the UNESCO World Heritage Site of Palmyra.

While the speaker narrating the video gets some of the identifications wrong, the images are heartening to see.  Clearly visible is the reconstructed Great Tetrapylon Dr. Khaled al-Asaad's team unearthed during the Palmyra Development Project from 1962 to 1966.  The video also gives an overall view of the Colonnaded Street from Diocletian's Camp, the transversal colonnade and the 2nd century CE, Roman theatre each  of which appear relatively intact.

Another drone video shows the mostly still preserved Fakhr-al-Din al-Maani Castle  (1590 - 1635).