Moto Camera Content 3 is not a publicly known or documented Android app or feature from Motorola. There[SQ]s no official information available about an app with that exact name. It[SQ]s possible :

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It[SQ]s an internal codename:

Motorola might use this name internally for a feature or app in development that hasn[SQ]t been released publicly.
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It[SQ]s a misremembered name:

The name might be slightly different, or you might be thinking of a different app or system component.
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It[SQ]s a third-party app:

It could be a less-known or custom app not widely available.

If you encountered this name somewhere, providing more context (like where you saw it) would help in figuring out what it actually refers to.