Incomplete documentation in Lite Youtube module

Problem/Motivation

The current codebase contains mixed language comments (Spanish mixed with English code), lacks documentation for private methods, and does not include usage examples in comments. This reduces code clarity and maintainability for developers.

Steps to reproduce

1. Review the source code of the Lite Youtube module.
2. Observe comments written partly in Spanish mixed with English code.
3. Note missing documentation on private methods.
4. Notice the absence of usage examples in method comments.

Proposed resolution

• Improve code documentation by: - Translating or standardizing comments into English.
• Adding PHPDoc comments for all private methods.
• Including clear usage examples where applicable in the code comments.

Remaining tasks

• Audit all source files for mixed language comments.
• Write and add missing PHPDoc for private methods.
• Add usage examples to method docblocks.

User interface changes

None.

API changes

None.

Data model changes

None.