How to get pictures and videos back from iCloud?

So my iPhone 5 started tripping so I called t mobile and they sent me a new one so before I sent my old one back I sent all my pictures to my iCloud but when I logged into iCloud on my new iPhone only some of my pictures was on there but I know I sent all them to my iCloud

Depends on your settings. Remember iCloud only gives you 5gb FREE. Any more than that and you have to pay Apple a yearly fee. If it was more than 5gb they might be gone for good.
Why I always suggest people to backup all data locally on a PC with iTunes just to be sure.
You can try here but fairly certain it's a wash.
https://www.icloud.com/...cloud.com/
Best luck.