Hi there! I understand that you're seeing a "source error" when trying to playback your doorbell camera footage in the Vivint app. Let me help you get that sorted out. To begin, could you tell me if this issue happens only with the doorbell camera, or with other cameras as well? Also, are you using the Vivint app on your Windows device or through another device? This info will help me narrow down the cause.

In the meantime, here are a few steps we can try to potentially resolve the playback issue:

1. Power Cycle Devices: Unplug your doorbell camera and the Vivint panel or hub (if you have one), wait about 30 seconds, then plug them back in. This can refresh the connection and clear minor glitches.

2. Toggle Playback Setting: In the Vivint app, try turning Playback off for the doorbell camera, wait a few seconds, then turn it back on. This can reset the playback stream.

3. Check Network Connection: Ensure your doorbell camera is connected to your Wi-Fi network with a strong signal. Playback errors can happen if connectivity is weak or intermittent.

4. App Update & Cache Clear: Make sure your Vivint app is updated to the latest version. Sometimes, clearing the app cache or reinstalling the app can also help.

If you've already tried these or if the problem continues, let me know and we can dive into more advanced troubleshooting like checking recording settings or local storage health.

How does that sound? Are you able to try these steps and let me know what happens?