Epix is a channel exclusive to Verizon Fios so if you don't have it (or live in the US to watch it online), you'll have to wait until the DVD is released to see it.
Hopefully because Madonna is so involved with the things she puts out, it won't be a mess like the Femme Fatale Special on Epix in 2011.
They dubbed her 'live vocals' with the studio version and it's the most awkward thing to watch.