Why is my stream lagging on Twitch?

I want to start streaming and had my first try last night. I got everything I needed for it, but unfortunately the stream is very jerky. So there will certainly be no spectators.

Play Warzone on PS4
connected to Elgato HD60s + via MacBook 13 "in early 2015
PS4 is connected with a cable via a Powerline adapter
MacBook is connected via Powerline adapter and original Apple thunderbold adapter (because the Mac does not have an Ethernet connection)
Have a 100k VDSL line
Work with OBS Studio and start the stream on Twitch over it

Unfortunately I don't know why… The image is also very delayed.

Does somebody has any idea?

Bad connection could be. Maybe your Wi-Fi is not sufficient

Maybe your MacBook doesn't have enough processing power to encode the stream.

Purely from the Internet etc. It should actually work.

But unfortunately the stream is jerky.

This is probably due to your MacBook and / or wrong settings.

The whole thing runs over D-Lan

Which settings must be given with OBS or with the Mac?

That depends on what hardware you have.