Interesting perspective, considering a paper ByteDance just released yesterday [1] has much worse video quality. If your comparison is to real videos, then for sure the quality isn't great. If instead you compare to other released research, the this model is one of the best released thus far.
Yeah, some were impressive, but others looked quite bad. The guy running in the desert looked like a guy floating over the ground only sporadically making contact with the sand. The footfalls in a lot of these videos look pretty janky or "soft".
The clothing changes also have pretty rough edges, or just look like they're floating over the original model. The 3D glasses one looked atrocious. The lighting changes are also pretty lacking.