For reference. the character of Saga Anderson was originally white.

https://twitter.com/SamLakeRMD/status/677973716375052288 (Sorry for not archiving. Been a while since I did it.)

Alan Wake 2 isn't a reboot or re-imagining. It's a sequel, and part of the same universe this video was made for. I've heard it referred to as a 'teaser', but in Remedy games, especially Alan Wake, these live action productions are considered serious parts of the lore.

Apparently the actress playing the white Saga Anderson died. And in recasting her, they decided to abandon believable continuity to make her an empowered black role model.

There's some weird reality-bending shit going on in the Alan Wake universe, so one could say it's explainable. But whether it is explained it or not, I don't know, as I, a former fan, have no desire to play this woke trash.

You know exactly why they did this. They are saying it right here in the screenshot provided by u/alucard13mmfmj/. You can make an informed guess about the kind of people they are and what they think of their audience.