well... they interact with the viewers and so on, not just them)))
for example, I enjoy waiting for the song to start if they chat for a couple of minutes beforehand... it's okay if it's a video, then you can watch it))
I have a video of the entire concert, I've watched it several times, I really like it))

P.S. regarding the songs... it doesn't always turn out to perform the songs better than the original) sometimes the music is a little different and so on, but it's not always good) IMHO.