Is it possible to add apps such as VEEPs in Apple TV to watch streaming concerts?

• If you have an Apple TV box (4th generation or later), then you can install the Veeps app on there to stream content.
• The Apple TV app on third party devices will not help for this. No content can be added beyond what is offered in the app.
• If you have an AirPlay-receiving TV or streaming device (including Apple TV box), then you can choose to stream using AirPlay to the big screen.
• If you have a Roku, they also have a Veeps app for that.
• Select TV browsers may be able to access the streams.

Supported browsers and devices - Veeps Support