If you're getting a crash rendering animations to a codec you may be encountering a known bug. Rendering to anything but an image sequence causes a crash on Mac. We chased the bug for months. It was resolved by the latest Mac OS update, Ventura OSX 13.0.1 resolves the issue. Seems it wasn't a Poser bug.

Anyway it's best to render to image sequences. That way if the render bombs you can just pick up where you left off. Use something like Quick Time, Premeire or the freeware Kdenlive to encode the video. You'll get better encoding quality control and less do-over frustration.