Uniqueizing videos for ticktocks and bypassing moderation

Good afternoon readers, I am interested in the issue of video uniqueization, found in tiktok such an account, which collects a large number of views.
I wonder how he made this uniqueizer, I tried to make a script for ffmpg but similar did not work.
Maybe someone who knows more about uniqueization and can tell me how to do something like this.
Thank you!
Account:

[Link removed by Mods, you can't add it, screenshot is enough]

The most reliable way to make a video unique on TikTok is to perform manual processing. This requires a serious approach, involving the manipulation of the video track, layers, and audio. In extreme cases, you might resort to custom-developed software or tailored solutions. As social media algorithms are constantly evolving, the methods that used to work are no longer as effective.