How does watch time work on YouTube?

Related questions

1. What QQ external?
2. What does unique viewers mean on YouTube?
3. What is the average YouTube video length?
4. What is a good view Like ratio?
5. How can I see my subscribers?
6. How much money does a YouTuber with 1 million subscribers make?
7. What does shares mean on youtube?
8. Is it OK if I delete .OBB files?
9. Can YouTube channel owners see who views their videos?
10. Is it safe to delete Tencent folder?

Tags

1. #viewers
2. #spend
3. #through
4. #total
5. #popularly
6. #views
7. #retention
8. #which
9. #youtube
10. #videos
11. #amount
12. #analytics
13. #leads
14. #recommended
15. #boost
16. #likely
17. #watch
18. #called
19. #channel
20. #aggregate
21. #watching
22. #audience
23. #search
24. #promote