The YouTube algorithm certainly has its way sometimes, seemingly promoting completely random videos one day and something else the next.
While travel Vlogging is nothing new, especially on YouTube, the methods which Vloggers may use in their videos is something that can change over time.
I guess that this new trend of high quality 'street walks' is another one that we will continue to see in the future.
Personally, I think they are quite enjoyable to watch! They give you a better feeling for a place than someone talking about their experience, leaving you with your own imagination as to how you would react if you were in the creator's place.
For example, see if you can see a cat about 30 seconds after the share point in this one