The US National Archives and Records Administration (NARA) holds an annual Online Genealogy Fair. This year's fair starts tomorrow, 28 Oct 2014. There will be three sessions on their YouTube Channel starting at 10 AM Eastern time. The link to the schedule page is broken at the moment, but the press release is at archives.gov/press/press-releases/2014/nr14-96.html

Recorded sessions and handouts will be available free of charge after the event on the Virtual Genealogy Fair website.

Day 1: Tuesday, October 28 - Watch live on YouTube youtube.com/watch?v=cy8sqN1TUF8

Day 2: Wednesday, October 29 - Watch live on YouTube youtube.com/watch?v=hIuirre9BN8

Day 3: Thursday, October 30 - Watch live on YouTube youtube.com/watch?v=rUAq9bik8ZY

NARA's YouTube video channel has many videos, including this one on finding Death Records for Civil War Soldiers:

Super presentation, very thorough.