I am using Open Broadcaster Software as my stream tool and I am running my stream in 720+ resolution. I want to add some more resolutions so that people with lower mbit/s internets can watch as well. How do I do to add ex. 480p and 360p?
You can only stream to Twitch in one resolution. You can get transcodes (more resolutions) from Twitch if you become a Twitch Partner.