I can plan, capture and edit a 30s app preview video or mobile ad, using the experience I've gained editing dozens of them.

I'll play the game with my Sony Xperia 10 V, for which I would need an .apk file.

I'll write a script suggestion to show the client

Once the script has been locked, I'll capture the needed shots and edit the trailer in Premiere and After Effects, using suitable stock music edited to fit the structure

Once the trailer is finished in one size, I'll show it to the client and do the revisions needed to make them happy with the result.

I'd do the rest of the resolutions needed for AppStore by cropping and adding blurred footage on the empty spaces, unless the client wants me to capture the different resolutions separately.