I have my jailbroken iphone 4s on iOS 8.3 running plexconnect! (Also a mini2 on 8.3, ipad 3 on 8.3.)
SSH into your JB iOS device (install OpenSSH from the BB repo if needed) then paste this easy one liner or fire up mobile terminal on your iOS device and paste it using that instead. "APT 0.7 Strict" or higher required (a simple search in cydia will allow you to install it, required for apt-get function). INSTALL "APT 0.7 strict" PRIOR TO RUNNING THIS COMMAND BELOW!
iBaa or Wahlman.j with prompts for desired theme & optional autoupdating plist:
apt-get -y update; apt-get -y upgrade; apt-get -y install git; rm -R /Applications/iosjailbreak; cd /Applications; git clone git://github.com/wahlmanj/iosjailbreak.git; cd /Applications/iosjailbreak; ./installios.bash
Please note PIL (Fanart) does not work using this method...yet (not sure if it ever will).
This method is best suited for traveling, you can connect multiple devices to one jailbroken PlexConnect host or repurposing an old or new iOS device to be a PlexConnect host. Not everyone brings a laptop when traveling or uses airplay from the Plex for iOS app or other airplay enabled devices. Personally I prefer a remote to control my aTV and find airplaying to cause an immense amount of congestion on any network that I have ever used. If you do use this method I suggest to turn on airplay mode then turn your wifi back on to keep your network connection on your iOS device alive even if your iOS device has its screen locked.