Copyright Disclaimer under Section 107 of the copyright act 1976, allowance is made for fair use for purposes such as criticism, comment, news reporting, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favour of fair use.
1) This video does not have a negative impact on the revenue of the original video
2) This video is similar to a “movie trailer” and will only increase the demand of the original full match video
Source：BWF TV https://www.youtube.com/user/bwf