This video will stay up until I no longer need assistance regarding this.

If anyone is willing to volunteer their help, or knows anyone that might be able to help (Watch the whole video for all the information), please contact, or have them contact me through Twitter DMs:
https://twitter.com/_DJTHED

EDIT:
I made a follow up video elaborating on how exactly I'm going to be animating a Pony playing this Piano in the first place. You can find it here:
https://youtu.be/sY9qev8wt8w