Just a small reminder that those videos interest no one. Quality of the audio is horrible and would not even be fun for a deaf person. In the meantime, it's a +7min video, meaning you've ruined 7 minutes of the show for at least you + all the people around. If you want to do stuff like this, please join the taylor swift community, it's full of people like you and at least, you'd belong there.
I usually go for a spot where I don't disturb anyone and use my zoom lens. Sometimes it's like you say nobody's interested, but recording 1-2 songs is also a nice memory for myself...