Capture burned-in video subtitles and convert to pinyin for learners

Capture burned-in video subtitles and convert to pinyin for learners targets a $1.2B = 2M users x $5/mo x 12. Rationale: target global active language learners who use video as a study channel; 2M paying users at a $5/mo consumer ARPU is a conservative TAM for a niche EdTech tool. total addressable market with medium saturation and a year-over-year growth rate of 10-15% growth for language learning app usage driven by mobile and video consumption.

Key trends driving demand: Burned-in subtitles in short-form video -- more native-language learning content is delivered with non-extractable captions, creating a new need for capture tools.; Rise of immersion learning via native content -- learners prefer native materials and microlearning from clips, increasing daily usage frequency.; Improved client-side OCR and romanization libraries -- makes accurate real-time extraction and pinyin conversion feasible in extensions..