I read through that, but that last part basically says "if someone hasn't watched your content, you can revoke the license from the content by deleting it". If anyone has seen any of the other content, the company owns a perpetual license for it. Regarding their site content, it would appear they think they own everything on the site, including user content:

> Unless otherwise indicated, all Content and other materials on the Livecoding.tv Services, including, without limitation...

That goes on to list all types of content, that the content is trademarked, copyrighted, etc. and then states they own all of the licenses to it, as I mention in my comments above.

In comparison, here's Github's statement on the rights to content:

> We claim no intellectual property rights over the material you provide to the Service. Your profile and materials uploaded remain yours.