City Walks is essentially a really nice display of street-level YouTube videos with some additional menu options overlaid on them. That's not meant as a knock on the site as it is a nice site. That does mean that there isn't any interactivity built into virtual walks like you might experience in a virtual reality experience. The video sources for City Walks are clearly labeled in the lower-right corner of each screen.
Applications for Education
City Walks isn't going to replace Google Expeditions (ending in 2021) or Google Arts & Culture, but it is a good additional resource to have bookmarked when you want to give students a street-level view of cities that they learn about in your classroom.