Hi there Vally44,
If you're unable to play a video in the Apple TV app, you'll want to start by working through these troubleshooting steps:
If the movie or TV show won't start playing
After each step, try to stream or download the movie or TV show again.
1. Check the System Status page for service interruptions or check a third-party provider's website for any interruptions. If there are service interruptions, try to stream or watch the video later.
2. If you're having trouble signing in with your Apple ID, you can reset your Apple ID password or learn how to get a verification code and sign in with two-factor authentication.
3. If your cellular connection is poor, connect to Wi-Fi instead.*
4. Try watching on a different device using the same Wi-Fi or cellular connection. If it doesn't work, contact your internet service provider to see if there's an issue with your network.
5. If other people are using Apple TV+ or Apple TV channels, make sure it doesn't exceed the limits for streaming on multiple devices.
You'll find this information here: If you can't watch or stream movies and TV shows in the Apple TV app - Apple Support
If the issue persists, work through the remaining steps in the support article above to see if they resolve they issue for you.
If not, reaching out to Apple Support directly is the next best step. They're best-equipped to provide additional guidance. This link will help you get started: If you can't watch or stream movies and TV shows in the Apple TV app - Apple Support
Take care.