Beta Testing provides feedback from actual users in real-world settings. Usability issues flagged during Beta Testing are crucial as they provide insights into how the software is perceived by the end-users. The best approach would be to conduct a focused usability testing session to deeply understand the feedback, make necessary adjustments, and improve the software's usability.

In a Continuous Deployment setup, rapid feedback is essential to ensure the frequent releases don't break functionality. An Automation Tester plays a critical role here, as they set up automated test cases that can quickly validate the software's functionality after every release, ensuring rapid feedback without manual intervention.

Incremental integration testing involves integrating one component at a time, testing it, and then moving to the next, ensuring that defects are identified and corrected at each step. This approach is efficient in pinpointing issues.

Static testing involves examining the code, requirements, or design without executing it, to identify issues early on. Dynamic testing, on the other hand, validates the software by executing it in real-time scenarios. This fundamental difference in execution separates the two.

Beta testing is a type of user acceptance testing where the software is released to a limited number of end-users to obtain feedback and report bugs. This feedback is essential to improve software quality before its broader or official release.

Captions for video content primarily cater to users with auditory impairments. They provide a textual representation of the spoken content, background noises, and other relevant auditory information, ensuring accessibility for the deaf or hard-of-hearing community.

Static Code Analysis involves analyzing the software's source code without executing it to identify potential vulnerabilities. This method can detect security issues like buffer overflows, SQL injection, and more at an early stage, making it a suitable choice for ensuring the software doesn't have security vulnerabilities.

Regression Testing is aimed at ensuring that recent code changes haven't adversely affected existing features. Whenever there's a code change to fix defects or introduce new functionalities, there's a potential to introduce or uncover new issues like app crashes, broken links, or functional discrepancies. Regression testing catches these and ensures that the application's previous functionality remains intact.

The keyword-driven scripting technique, also known as table-driven testing, allows test scripts to be developed using predefined keywords, each representing a specific functionality or method. This approach abstracts the coding complexity, making it user-friendly and often used in frameworks to separate test logic from the test scripts.

White Box Testing, also known as Glass Box or Structural Testing, involves testing the internal structures of an application. In this case, if the goal is to validate the internal algorithm structures and logic, White Box Testing allows testers to evaluate the intricacies of the application's internal code and logic structures.