Faceless Video App

Create a detailed explanation of a "Faceless Video App" concept. Your response should cover the following points:

• Define what a faceless video app is.
• Explain potential use cases for a faceless video app.
• Describe the key features such an app should have.
• Illustrate some privacy and security considerations for a faceless video app.
• Discuss potential challenges and limitations when developing a faceless video app.

Ask me clarifying questions until you are 95% confident you can complete the task successfully. Take a deep breath and take it step by step. Remember to search the internet to retrieve up-to-date information.