Yes of course, if it's for a professional production (and these days even many Youtube videos are professional productions) a (semi)-pro camera has a lot more h

Yes of course, if it's for a professional production (and these days even many Youtube videos are professional productions) a (semi)-pro camera has a lot more headroom. But it will require knowledge, experience and additional equipment to better what an iPhone will do out of the box. This video is quite a good illustration, pitting an iPhone 12 Pro against a Sony A7iii (a quite respectable camera): https://youtu.be/TrEdAKCHSZg https://youtu.be/TrEdAKCHSZg With these default settings the A7iii is blowing out the highlights in the sky, the church and the swan. Which could have been prevented by choosing one of the Log settings but then it would have required making adjustments during video editing. If it's for taking a video of family / kids and sharing it immediately with friends/family, the iPhone will produce better results with minimal effort (and that's not to mention having to bring a heavy camera, lenses, tripod/gimbal, accessories).