Sorry maybe I’m not understanding properly this question?
You are wanting to play ‘videos’ in video mode? Is that what you mean by extended? Or you want to play ‘games’ in video mode?
If you mean watch a video in video mode, well that’s what it’s for! So any good vr video player can do that… There are some good ones out there and if you search on the forum for Video payers you will get their names.
If you mean play games in video mode, then you are using a method that it was not designed to do, so you will get varying degrees of success… There is VORPX (there is a cost), tridef, vr mods, big screen beta to name a few, some of them will inject an illusion of vr, others will mearly show the game on what is effectively a big screen in your headset.
But basically depending on the game will depend on your level of success.
Don’t forget that pimax are planning on implementing brightness/contrast sliders into pitool in a future release, so that may negate the need to ‘workaround’ this limitation.