AI-generated. On the bottom right corner, it says "Powered by Synthesia" which is an AI video creation platform:
https://www.newgrounds.com/wiki/help-information/terms-of-use/movie-guidelines
AI Animation
This will be an evolving area. If you are an artist who is using AI to assist you in your process, this is most likely fine. We will be removing things like AI slideshows, however. For example if you take an audio track and play it alongside static images generated by AI, that will likely be removed.
While being assisted by AI on fine, I don't think AI doing all the work is.