Add Unit Tests for Video Capture Module

[Blindspot22]

Description:

• Create comprehensive unit tests to ensure the video capture functionality works correctly and handles edge cases.

Implementation Steps:

• Set up a testing framework in the Rust project using cargo test.
• Write unit tests to verify that the camera capture initializes and retrieves frames correctly.
• Write unit tests to verify that video file loading works with different file formats and scenarios.
• Write unit tests to ensure error handling mechanisms work as expected, simulating common failures.
• Run all tests to ensure the video capture functionality is robust and ready for deployment.