So for the parade they not only have J-15T flyover, but also may have footages of it being launched from PLAN Fujian?
We don't know.
We'll get footage of launches from Fujian in time -- whether it's the parade, or during news of Fujian's commissioning, or just quietly dropping footage on a random day because they feel like it.
There isn't necessarily a rhyme or reason to it, and imo there's no reason to try and anticipate or even to look forward to it at this point. It's an open secret that Fujian has conducted launches and recoveries which will virtually guarantees J-15T, all footage would do is just tick off that "launch and recovery" is a milestone that can be categorically ticked off even among people who are skeptical to PLA watching norms.