Here's a vid of the install of the one in that basement video. They're anywhere from $1600 to $5000, depending on the size and accessories you add.
View: https://www.youtube.com/watch?v=gecr2F1KZhU
My basement isn't big enough for the jumbotron but I am going to install (4) 55" Flatscreens like this at some point (preferably before March Madness).
View: https://www.youtube.com/watch?v=TgPNcB_TLVY
