A friend of mine purposely put off seeing season four of MLP: FiM until after the New Year so that he could get together with someone else for a dual blind commentary on the premiere.  This is a small sampling of what resulted.  For the full commentary, see the links below.

They also recorded a semi-blind commentary for the movie Equestria Girls, for which only Eizen was blind.  That one will be out shortly.

Video on Eizen's DailyMotion channel:
http://www.dailymotion.com/video/x1a7cec_let-s-react-to-mlp-fim-s4-e1-2-princess-twilight-sparkle_fun

Video on Bohepans's YouTube channel:
https://www.youtube.com/watch?v=qFRQ7Xzo4pM

Blind commentators:
http://www.youtube.com/BohepansTheThird
http://www.dailymotion.com/EizenDAnimeniac