@hotmustain
If you do not want to just change the SSID name and password of your new router to match that of your old router (so devices would automatically connect), you will just need to setup the camera again.
If you just setup your camera again through the mobile app, you can enter the new SSID and password.
From the following Support article (https://support.roku.com/article/7875457614743) under "Advanced troubleshooting steps"...
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Set up your device again
You do not need to remove your smart home device from the mobile app to set it up again. Simply follow the steps below and see if that resolves your issue.
Open the Home Home screen icon in Roku Smart Home mobile app screen
Tap the plus sign add a device plus icon in Roku Smart Home mobile app from the navigation bar ((upper left top of screen))
Select Add device
Select your device category and then select a device
Follow the on-screen instructions.
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During the setup, you will be provided a Network Screen to enter the new credentials.
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