Hello, i have a friend who has this game and I was asking him if he would do a speedrun of this game. So this game would be pretty long to stream in one go. Would he be able to take 2 sections of it. Like 1 half in one stream and another half in another stream

The game isn't too long, Flurby has a time of 2:18. I'm sure your friend can manage sub 3 hours. There have been runs where only if it's due to technical difficulties on Twitch's part or OBS and the VOD is split. However if this is the case it must have a timer of some kind like livesplit so we can better tell the time of the completed run.

It does say in the rules they must be single segment so I am afraid not on the two streams. But like I said if Twitch's highlights mess up or OBS and the VOD is split then you can have two VODs. So as long as you have a timer shown and they are of the same run.