The speed of light (fiber optics, and similar electricity for cable networks and Ethernet) isn't that fast when crossing large distances. And then YouTube, like all re-streaming providers, re-encodes most videos (which takes a few seconds) to save on bandwidth distribution.
So, if you are asking about being live, and that viewers on YouTube (Facebook, Twitch, etc) are watching a livestream are seeing the content anywhere from 15/20 seconds, to more often 30 seconds, if not occasionally 1+ minutes... that is normal and expected.
If you find a certain delay from live to livestream viewership, and it is worse with one application (game) vs others, then a log post as noted above would be a start. Not all apps play nicely with OBS and the tech it uses to capture video.
And then there is what all else is going on at the same time in your Operating System. real-time video encoding is VERY computationally demanding, and driving blind (lack of OS and network level real-time monitoring is the equivalent of driving blindfolded. I recommend monitoring hardware resource (CPU, GPU, RAM, Disk I/O, etc) utilization [for ex. using Task manager’s Performance tab and/or Resource Monitor] to see if your system is being maxed out with your settings