Integrate Blackblaze with Firebase and Cloudflare

im searching for someone who can help with following: i‘ve build an app where users can upload videos. Currently im using cloud storage as storage and saving the urls into cloud firestore. Whenever i wanna display a video for other users, i just call the url .i need someone who can setup blackblaze as my origin store with cloudflare as cdn and saving blackblaze image/video url into cloud firestore. The app is written in Flutter. So when a user uploads a video the video should get uploaded into blackblaze instead of cloud storage and when we display a video , it should serve by cloudflare. We still need to upload the urls into cloudfirestore.