Unable play on Apple TV when playing videos from on My Passport on iPad

OK, let me know if you sill have issues

I keep my MPW in performance mode all the time, because I keep it plugged into its power supply 24/7, unless I am truly using it as a portable unit.

Suggest you also see this related thread I answered after I answered yours a few days apart.

http://community.wd.com/t5/My-Passport-Wireless/AirPlay-for-MyCloud-app-and-Passport-Wireless/m-p/832630#M582