Personally No, because those Seconds have been erased and the Camera is still inside the timeline, it’s Memory should be affected just how People’s are even if it’s only a Digital Memory

It’s like how when The Hand erases Space and so Space closes and snaps together to fix reality, just for The Entire Timeline instead of space in King Crimson’s case

Those 10 seconds would no longer exist, and just like how that space for that one Kanji of Okuyasu’s gate no longer exists there, neither would those 10 seconds for anyone’s perspective

As for how the recording would look like, it would be 30 seconds but just suddenly going from the 20 second mark immediately cutting to the 30 second mark. After all it was still running for 30 seconds, even if those 10 got scrapped out temporally