I don't see anything out of place for 1906. This video is obviously highly 'enhanced', the original is readily found. There is a car that resembles a Model T at 5:36, but with that video and no Ford logo, I would guess that it is just one of many of the cars at the time that generally resembled the Model T. And the numbers of cars might have been a little higher on Market Street than the general average for the area. And the buildings along that street were large masonry, banks and such, not the wooden houses that the rest of the city was made out of. I'm sure that an actual historian would not have any difficulty authenticating or refuting this. Here's a side-by-side before and after with the original version of this video and a newsreel from the aftermath. And a narrated version of the original.