Question / Help Nginx conf help

[Craig Baker]

Can anyone explain to me what chunk size is and the the value represents? like the numerical value represents bytes? and is a lower or high number better? Im using it to stream to twitch, youtube, and hitbox and my feeds to youtube and hitbox are decent, little pixelated, but twitch has random lag. Can I increase the quality with variables, and if so, which ones? Im getting around 11.8Mbps upload on average with speedtest and had my bitrate in OBS at 2000, I did change to 2750 after streaming and considering going to 3000. but I dont want to go too high on the upload

log file attached but I did make some changes since the last time I streamed.

Youtube (edit may still being applied, if it is almost an hour long that is original, cutting it down to small size)
https://www.youtube.com/watch?v=4IHAzFxzzxM&ab_channel=Ruthven78SaltyGamer

Hitbox (for some weird reason the VOD didnt start till almost 9 minutes in)
http://www.hitbox.tv/video/934253

Twitch
https://www.twitch.tv/ruthven78/v/53967475 (if you look at the previous highlight there isnt the stutter)

 

[Craig Baker]

my nginx conf, RMPT servers based on lowest pings shown in OBS plugin, stream keys redacted.

#user  nobody;
worker_processes  1;
events {
    worker_connections  1024;
}

rtmp {
server {
listen 1935;
chunk_size 4096;

application live {
live on;
record off;
push rtmp://a.rtmp.youtube.com/live2/[streamkey];
push rtmp://live-sea.twitch.tv/app/[streamkey];
push rtmp://live.hitbox.tv/push/[streamkey]

;
}
}
}