As it is more than likely for a 24/7 stream to be interupted (network issue, software crash, …), you should try « permanent live ».
And probably uncheck « automatically publish a replay when your live ends », because… your live should not end, and it could use a huge amount of storage space on the server.
Please note that your instance admin can set a max duration for lives:
(I don’t know if your instance has such a limit).
Have you any error log on OBS ?
Maybe try without the obs-multi-rtmp, just in case the addon is buggy.
If it still fails, contact your instance’s admin to ask them if there is any log on the server (there is a contact form in the about page).
Latency mode, as explained in the value list (see screenshot), changes the p2p usage for your live.
Peertube use peer-2-peer to share bandwidth between all users currently watching the video.
If you are expecting many viewers, set the latency to hight, to save server’s bandwitdh. The counterpart is that viewers will see your live with a ~60seconds lag.
If you only expect a few viewers, and you want to minimize the lag, set to small.
