is it possible to do 2-person split screen on the halo 5 beta? If so, how?
No, i tried in multiple ways and i cant 
There is no split-screen for the beta unfortunately, but it will be in the final release
Well that sucks a lot! Do you know if they plan to release split screen in the beta at all?
I haven’t heard anything on that, but I imagine the answer would be no. There may be a few updates to address server-side bugs and issues stopping users from playing, but I don’t see them adding features in the next 3 weeks.
Well that is truly unfortunate and surprising. I guess we will have to wait for the game to officially be released next year before we can play on the same console.
I think they were trying to focus more on gameplay, balancing and general bug fixing with the beta and finding out from users what is liked and disliked. I know from reading the forums that a LOT of people want split screen, so I’m sure they’ll do their best to get it working