Lol... what is advance AI. Those video all same girl n randomly sitch together... no story telling..
You see his "melody" channel.
He release one video every day, with a duration between 2-3 mins, with a higher 1440p resolution.
He did not reuse video clips within the same video.
The characters have specific poses and their fingers remained mushy sometimes.
The clothing is not fully consistent throughout the video.
But still he can monetise the channel within 2 weeks and the retention of his videos is likely to be very high.
He might be paying Hailuo AI for the unlimited plan and all his images were prepared beforehand, focusing on faces.
Then everyday just generate 200-300 video clips using their Minimax's Subject Reference model.
This would be the easiest solution, but it also deters a lot of other creators from doing so.