Boost YouTube Watch Hours for Monetization

I need to increase watch hours on my entertainment YouTube channel, focused on kids' badminton and skating videos, in order to qualify for monetization.

Requirements:
- Proven strategies to boost watch hours
- Experience with entertainment content, especially kids' sports
- Ability to attract and retain viewers

Ideal Skills:
- YouTube SEO
- Audience engagement tactics
- Analytics and performance tracking

Please share your strategy and relevant experience.