I need a PHP And Apps full-stack developer

Hello Developer,
My apps have some issues.
1. Videos can be uploaded from the website but it takes a lot of time, I want to be able to upload videos very soon.
2. Videos cannot be uploaded from apps but I want any user to be able to upload videos from my apps.
3. The website supports Youtube videos but the apps do not support Youtube videos after setting up the youtube key. I want to solve this problem
4. No posts from Facebook support my website or apps. I want any user to be able to share images, videos from Facebook and post them on my website and apps. I mean, if any user wants to click the share button below the image, video from Facebook, my apps will show and my apps will be posted from the posting page as soon as they click. And need to support Facebook images, videos
Can you work with a guarantee?

App Link: https://play.google.com/store/apps/details?id=com.sanatansocialnetwork.krishnagod
Website Link: https://krishnagod.com

demo User: srabonray
demo Pass: 123456