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It's not so much that it would be impratical (video streaming, like HLS or MPEG-Dash, requires to chunk videos in pieces of roughly this size) but you'd lose the inter-frame consistency at segments boundaries, and I suspect the resulting video would be flickering at the transition.

It could work for TV or movies if done properly at the scene transition time though.

7s is pretty alright, I've seen HLS chunks of 6 seconds, that's pretty common I think.

6s was adopted as the "standard" by Apple [0].

For live streaming it's pretty common to see 2 or 3 seconds (reduces broadcast delay, but with some caveats).

0: https://dev.to/100mslive/introduction-to-low-latency-streami...

You will probably have to have some overhang of time to get the state space to match enough to minimize flicker in between fragments.

Perhaps a second pass that focuses on smoothing out the frames where the clips are joined.

You could probably mitigate this by using overlapping clips and fading between them. Pretty crude but could be close to unnoticeable, depending on how unstable the technique actually is.

Maybe they could do a lower framerate and then use a different AI tool to interpolate something smoother.