i have a co op speedrun to submit but the host of the world is lazy as hell to upload the video. do they allow different member beside the host's perspective?

doing a co op speedrun and my friend leaves for a few seconds or minutes is it allowed?

i want to speedrun with my friend but we cant join each other all it says is unable to connect to world alt accounts dont work either

is it allowed to have a record or world record on both platforms on the same category like on any% ssg runs?