It seems almost no other YouTuber's have tested the video stabilisation on the new 5x zoom lens on the iPhone 15 Pro Max. So here's my very quick test, performed in the 10 minutes I had with the phone.

This is testing video stabilization, which is the equivalent of a 120mm full frame lens. Most normal DSLRs offer very limited stabilisation, so this could be a game changer for handheld zoom footage.

00:00 Pics
00:16 Handheld 5x zoom test
00:46 2.6x zoom test
01:18 Variable zoom test, and 25x test
02:09 Test while walking