You buy a video that tells how to check your sites for availability for free. Checking sites is carried out using the script, which is freely available, so again, sold the author's video.
Product is a text document which contains the password of THE RAR archive https://yadi.sk/d/4dZSlq7e3Xb8F2. In the archive you will find a video and a script file in the format *.php, which is a bit modified by me.
Claims and returns are not accepted, the script can be found in open sources, the script works, it is seen in the video.