As others suggested, purchase a real top-level domain rather than a free domain and hosting. It's generally looked down upon to sell products on a free website.

Also, look into having at least a semi-decent looking website. In general, people don't like to stay on an unattractive websites.

Otherwise, you have included a thorough amount of description on the script(s) you are selling which is good for marketing. The video is especially useful as well as the sample, relevant code.