Yes that's what someone who had a very detailed test procedure noted. You can record (for instance) 1080p all day...even after the camera has 'overheated' shooting 8K.One thing of context that I have only seen written once. Even when the camera stops recording in the limited modes, 8k, 4k120 etc, it will still work as a stills and video camera for any other mode, instantly. This is not the behavior all other hybrids exhibit, once they ‘overheat’ they are bricks. The Canon NEVER bricks even when it won’t record in the limited modes anymore.
(That suggests to me that the heat limits the camera follows are very conservative.)