Do you enjoy watching old concerts? If so then you’re going to love what Music Vault did this week when it uploaded roughly 13,000 new videos of concert live footage onto its YouTube page. Now, some warnings for any teenyboppers out there who think they’ll be able to go to this page and find the latest concert videos from Iggy Azalea, Katy Perry or Justin Bieber: You should know that these videos tilt very heavily toward the geriatric crowd, particularly fans of jam bands like the Grateful Dead and the Allman Brothers Band or classic rock acts like Lynyrd Skynyrd, Santana, the Who and the Rolling Stones. That said, we did find some videos of more contemporary acts such as Of