To determine whether Josh covered all of the criteria listed, you would need to review the content of his self-introduction vlog in detail. Each criterion should be evaluated based on what he included in his presentation:

1. **His background information**: Did he provide personal details that give context about himself?
2. **His qualifications**: Did he mention any educational background or certifications?
3. **His relevant experience**: Did he discuss previous jobs, internships, or skills relevant to the opportunity?
4. **Why he should be chosen**: Did he articulate reasons or strengths that make him a good candidate?
5. **His contact details**: Did he provide ways to reach him for further communication?
6. **Used formal language**: Was the language appropriate and professional throughout the vlog?

Once you analyze the vlog against these points, you'll be able to conclude if he covered all the criteria.