Are there any legality issues with students using the site/posting videos and pictures etc.?
No, WhatIMIN.com is a public website and is not affiliated with any school or school district. Think of WhatIMIN.com like the yellow pages website. On that website, people may join and create profiles and business may pay to promote themselves. The businesses do not assume liability for what happens on the site by becoming advertisers. WhatIMIN.com works the same way. Any youth from any where may currently join the website, but your subscription simply provides you with a page to promote your clubs. In addition the website is heavily monitored by the IMIN team to create a safer environment than is typically found online.
