Hello!
I am just starting here on freelancer but in i have years of experience as a graphic designer. In my portfolio you can find an animation that i made for music video (everything there is painted in photoshop and animated in after effects). I know the software very well so i guess it won't be a problem for me to do what you want.
If you are interested you can always contact me before accepting my bid, share the files and let me create some example work so you know that i will do the job.
Regards,
Emil H.