Many sites require you to enter a "text" (a CAPTCHA or a specific keyword) to prove you are a human before they provide the download link or start the stream. Common Ways to Resolve This:
This specific file refers to of the TV show 9-1-1 , titled "Buck, Actually." Why you are seeing this You have requested : 9-1-1.S02E08.720p.MP4.LEG....
Look for a small window or a field that says "Enter the text shown above." Many sites require you to enter a "text"