Who would pay
Heavy YouTube users, hearing-impaired individuals with subtitle needs, and multilingual learners willing to pay to improve experience.
Current workarounds
The existing YouTube subtitle function is limited, and users must accept default subtitle presentation, making it difficult to accommodate different preferences or needs.
MVP idea
Develop an extension that lets users freely adjust subtitle font, size, color, and even rewrite subtitle content, improving viewing comfort.
How to validate
First launch a free version to collect preferences and issues and analyze audience characteristics; risks include overcoming YouTube subtitle technical limitations and legality issues.