This is a page with a collection of vidoes of Constantinople and modern day Istanbul. Some are amazing virtual reality like recreations of old Byzantium.
Zooms of Hagia Sophia and other Monuments
Here's a great page of ZOOM views of Byzantine monuments in Constantinople - Tsargrad - and elsewhere.
Imperial Bedroom
Portrait Hall
Mauve Room
Maple Room
Aleksey's Bedroom
Nicholas's Study
Aleksey's Playroom
Formal Reception
Balcony View
Aleksey- Balcony
Children-Mauve
Nicholas's Bathroom
Alexandra- Mauve
Nicholas's Reception
Tsarskoe Selo Map