New FishFAQ Trademark video: What is a Trademark?

We have started uploading a new series of FishFAQ videos directed towards Trademarks. This first video starts with the most basic question: What is a Trademark?
It covers the purpose of trademarks, who they are meant to protect, and why the government is interested in doing so; the basic things that can be protected under trademark rights, and the historical beginning of the modern trademark system.