On another forum they mentioned they wanted to edit the video further.

From the video as I saw it it looked people were enjoying themselves. Unfortunately the video made it look like a group of people turned up and played music in a busy shopping street. Nothing more special than a large group of buskers.

I think that's a bit unfortunate. The original ambush video, Antwerp Central Station, was brilliant because of the surprise effect, the brilliance of the execution of the idea, the clash between performance and location and performance, the enthusiasm and skill of the people taking part. All those things and probably a few more. I didn't get anything remotely like that from this video, it was no more exciting or surprising than, well, a large group of buskers on a busy shopping street on a rainy saturday.