If you have recently updated the app, and now you tap on the Video option and get a screen that has the “Add Device” and “Shop” buttons, then likely that means you logged in to the updated app with a different account then you were logged in with before.
Try logging out, then back in with your mobile number.
If that doesn’t work, try logging in with alternate email addresses that you might have used.
We have had a MASSIVE number of support calls where after updating, people either log in with an email, when they initially signed up with a phone number, or log in with a different email than they used initially.
There is nothing within the update that can cause all of your cameras to disappear from the account.