Once you have launched a game supporting SharePlay with not allowed in this Region type error, go into the co-op mode, and whenever other local players are able to join, your buddy on SharePlay should be able to join as well. In other words, both keyboards share in controlling player one only. The 2nd Keyboard allows control of player one at the same time as the other keyboard.
We just plugged one into the Laptop (Windows 8) computer to test. If you are both in the same PSN Region, then you don't have to worry about that. 2nd KEYBOARD does NOT work for multiplayer.
So if you are in US and they are in UK, you can't SharePlay a game that has only released in US. Your buddy joining your SharePlay session doesn't have to own copy of the same game, but the game does have to be released in both your PSN Regions. Now you have to launch a game you want to play together. If neither of you have any error, SharePlay is basically working.
YOUTUBE GANG BEASTS HOW TO PLAY MULTIPLYER PC
Video game gang beasts free download pc developed by boneloaf published by double fine productions. The gamer has to fight with other players using the local multiplayer mode in the gang beasts pc game. Start a Party Chat and have 2 players in it (you and the other) Gang beasts is a high quality game that works in all major modern web browsers.