What components need to be transferred to a new housing for it to work

The back glass on my iPhone X has been broken for a while and I recently damaged the front screen where it presses randomly. I wanted to purchase a locked iPhone X off ebay and transfer the inner components from mine into the locked one as I thought this could fix both those issues and at a cheaper price. What would be the bare minimum parts that I would have to transfer from my phone into the new one? Ideally, I would like to keep the new battery as my current one is also starting to deteriorate.

I saw this video explaining the breakdown and I do have some experience remaining my iPhones in the past. Let me know what you think.

https://youtu.be/yPhSYAxRMPs