In this video, we see compositing pushed to its limit as six Star Wars movies play at once. The digital effect used in this piece was compositing as the six films were placed in parallel video tracks. They were then “chroma-key’d” to different extents so that parts of five of the movies would remain visible, while one played in the back without any chroma-keying to serve as a background. The result is a mess purely done for experimental and comedic purposes.
When it comes to our own work, we can take influence from this positively by using compositing and chroma-key features to create visual effects (like fire or electricity) without the danger or costs of doing it practically. When it comes to the montage assignment, this type of composting so that multiple scenes or layers can play at once can be effective. Think of training montages in action movies that uses digital effects like these to show multiple scenes at once and give the viewer a sense of time moving fast.
https://www.youtube.com/watch?v=q0EDV1HGbrc&ab_channel=JustinHackney
As for this link, we see an AI-generated video of a retro-futuristic carnival made using Runway Gen2. Reading the comments it appears many viewers enjoy the dream-like sense these artificial videos bring, perhaps effects like this can be used for surreal or unusual moments in a sci-fi or horror movie. Unlike many other digital effects, this tool is essentially producing the entire thing for you if you let it. I imagine it takes a lot of time to refine prompts, sift footage, and edit together the best parts, but you’re still limited in the sense that the entire picture is artificial.
Personally, the only benefit I see to using these in a serious project or motion-picture, would be for inspiration, or to make an artistic point/convey something “In-Human” like the idea stated earlier or using its “uncanny” sense as a tool in a horror or psychedellic sequence.