Regarding to the used footage:
I must state that in NO way, shape or form am I intending to infringe rights of the copyright holder. Content used is strictly for research/reviewing purposes and to help educate. All under the Fair Use law.
"Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, 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 favor of fair use."
Regarding to the background image:
The background image is a right free and stock free image downloaded at pixabay.com.
The image is modified from a color picture to a black and white picture to match with the style of the website.
Link to the (non-modified) image: https://pixabay.com/photos/football-ball-soccer-field-stadium-488714/