Can I charge to view videos of other people performing?
Disclaimer: I am not a lawyer, this is not legal advice, just my understanding of common application of copyright law. Copyright law varies between countries and even within countries, so you should consult a lawyer who is familiar with the copyright law in any relevant jurisdictions before proceeding.

You would need permission from the performers and may also need to pay a fee for reproduction of the music or any other copyright aspects of the performance (this can include lighting effects, dance moves, or any other creative aspects of the performance).

The performance itself would be copyright by the performing group, whoever is paying them to perform, or whoever organised the event, so you would first need their permission to reproduce the performance. This of course may involve a licensing agreement.

The music they are playing might also be subject to copyright, depending on how old it is, so you may need to pay the owner of said rights to reproduce it (yes, even though its someone else performing).

Other aspects of a performance can also be copyright; things like dance moves, lighting effects, any other video/music playing that might be visible, costumes, props, any artworks or even advertisements visible in the video. That said, may all be owned by the event organiser/producer so that may simplify things. But it can be harder in a public space to get permission from all relevant parties.