I can confirm the same issue while recording live concerts. It was happening on my 13 pro max. Now on my 14 pro max too. I replicated the issues on a 14 pro as well. The issues appears to be wide spread.
The issues seems to be related to the telephoto lens. If I stay below 2x zoom (1.9 or less and never having even temporarily zoomed into 2x or higher range), I seem to be able to record non stop with no crashes.
If you experiment and use your finger to cover each lense, you'll see that the telephoto lens continues to be used even when in less than 2x after having previously going into 2x mode. This will cause the crash after a while. I also think that if you cover the main lens, it will revert to the telephoto lens even when you've only been at less than 2x.
The issue appears to be caused by the telephoto lens. If you stay away from that lens, you're good.
For clarification of specifically what the issue is and as others have mentioned, the video will freeze but the timer will keep ticking for several seconds. It will then fade out and come back, but the recording has now stopped. I'm shooting 1080hd 60fps.
This is very frustrating and I'll be going to apple with this replicatable issue that's been happening for a few years now.