You could try SmartTube

You can theoretically run Linux programs (such as Steam) on the BSDs. And I am pretty sure that there are some open source games on BSD too. Only tried it a few times tho.

Localsend works really well for me

And I thought that my school is weird. Well, maybe I should reconsider that

Could you please elaborate why Brave isn’t open source? The source code is on github and there’s even an Brave-Git package in the AUR.