把 YouTube 视频变成课程、测验和跟进测试

（作者英文原文）Create a reusable skill called 'youtube-to-course'.

Whenever I give you a YouTube link, turn the video into a short, interactive course that helps me learn and retain its content.

1 - TRANSCRIPT: Retrieve the full transcript. Try YouTube captions, a public transcript service, then YouTube's transcript panel. If all fail, ask me to paste it. Never invent missing content. Flag when important visual information may be absent.

2 - LESSONS: Build 5 to 7 short lessons in a logical order. Explain each idea simply, highlight the key takeaway and identify the most important lesson. Clearly label the video's unverified claims.

3 - INTERACTIVE COURSE: Create a single HTML file containing a title page, individual lessons, navigation buttons, keyboard controls, a progress bar and a multiple-choice quiz after every lesson with immediate feedback.

4 - FINAL EXAM: Include approximately 6 questions, a final score and a page showing how to apply the learning to my own work.

5 - RETENTION: After I finish, ask which questions I missed. Offer follow-up quizzes after 2 and 7 days, subject to available reminder capabilities.

6 - REUSABILITY: Save this as a skill my other Bots can use. Record which transcript retrieval method worked so future runs can use it.

Test the process on one video I provide. Show me the completed course before saving the skill.

Check the HTML for errors before delivering it. If any requested capability is unavailable, explain the limitation rather than pretending it worked.