All About Pocket Knives

Captivating film; I noticed some instances of political bias and some other insignificant instances of ignorance concerning cutlery, but of course those good folk aren't knife collectors! Thank you Jerry; I watched the whole thing, of course!
Here is another good one, in my opinion:
https://www.pbs.org/video/nova-secrets-viking-sword/

Jerry and Cal
I cannot watch the video's as they are blocked by copyright laws.
Here's what appears when I try to watch them.
*This video contains content from LSD who has blocked it in your country on copyright grounds.*
Who is LSD

Grant