US National Archives
Nara: Big Picture: To Keep and Bear Arms
Video [29:01] published ca. 1974 on the American rifle and its historical role in keeping America free.
Center For Civic Education
60 Second Civics: Bill of Rights Pt. 17: The Second Amendment and Rights
The Bill of Rights contains positive and negative rights. The right to bear arms that is in the Second Amendment is considered to be a negative right.
HipHughes History
You Tube: The Second Amendment Explained
HipHughes lays down the 2nd amendment, if you don't know the words, you don't get to debate. A short lecture on the text, interpretations and history of the 2nd amendment so you can make up your own mind.