You are running an old version of OBS Studio (27.1.3). Please update to version 28.0.2 by going to Help -> Check for updates in OBS or by downloading the latest installer from the downloads page
and running it.
The encoder is skipping frames because of GPU overload. Read about troubleshooting tips in our GPU Overload Guide
Having the YUV Color range set to "Full" will cause playback issues in certain browsers and on various video platforms. Shadows, highlights and color will look off. In OBS, go to "Settings -> Advanced" and set "YUV Color Range" back to "Partial".
You are running macOS 12.0 Monterey, which is currently supported by Apple and the most recent version of OBS.