A user's allocated project quota is dependent on the plan they are subscribed to. Here's how you can check how many videos left for your subscription:
Once you have logged in to your account, go to the profile icon on the top right corner of your screen.
Click on 'My subscription' or 'Manage subscription' if you are in a team's workspace. from the dropdown menu to be taken to the subscription page.
On the subscription page, you will see the project quota panel where you will find all the details about your current subscription plan, quota, and usage.