Before I proceed, I'd like to clarify a few things:
Someone in 1940 looks directly into the hidden camera, smiles, and says, "Thanks for the download, Elias."
Spy cameras, like the ones implied in the title, have various applications:
The HiddenZone Spy Cam 19011940 40 Vids 1080p Exclusive has the following specifications:
Whether you're looking to monitor your home office, keep an eye on a storage area, or secure a hotel room while traveling, this device offers a blend of high-definition performance and "off-the-grid" reliability. Key Features and Specifications
If you are looking for information on how to use actual spy camera hardware (rather than this specific video set), modern mini WiFi cameras typically follow these general setup steps: