Making changes to photo booth application, repairing

Making changes to the 360-degree photo booth app - adding a "boomerang" effect, adding song selection (list) before recording starts, the app saves and stores photos in the browser's memory, you can view the recorded video and taken photos in the gallery tab, it is a web app.

And a bug fix - the image of the recording camera displays normally for the tablet, computer, but there is a black image after agreeing to use the camera when you enter the site via smartphone. Pictures, moreover, are taken, you can also start recording and play it back, but the preview is black.

I would very much appreciate it if you could leave an email address to yourself and an estimate for the above tasks.