Hi there andrés296,
If the built-in camera on your MacBook Pro isn't working, you'll want to try these steps to see if they resolve the issue for you:
Check the camera indicator light
If the camera indicator light next to the camera flashes green on your Mac notebook, contact Apple.
Update your software
Make sure your software is up to date.
Check Screen Time settings
If your Mac is using macOS Catalina and you use Screen Time, make sure your camera is turned on and apps that use the camera have time available.
1. Choose Apple menu > System Preferences, then click Screen Time.
2. Click Content & Privacy in the sidebar, then click Apps.
3. Make sure the checkbox for Camera is selected.
4. Click App Limits in the sidebar. If you need to use your camera with an app in the list, make sure the checkbox for Limits is not selected.
Give apps permission
If your Mac is using macOS Mojave or later, choose which apps can use your built-in camera:
1. Choose Apple menu > System Preferences, then click Security & Privacy.
2. Click the Privacy tab, then click Camera in the sidebar.
3. Select the checkbox next to the apps that you want to use your camera in. You might be prompted to quit and reopen an app before it can use your camera.
Try another app
Try to use your camera in another app. For example, if you can't use your camera in FaceTime, open Photo Booth.
You'll find this information here: If your built-in camera isn’t working on your Mac
If the issue persists, you'll want to reach out to Apple Support directly for more help. They're best-equipped to take a closer look and provide some additional guidance. This link will help you get started: Contact - Official Apple Support
Take care.