Here’s Gordon Rhea giving an excellent presentation at Pamplin Park on the Battle of Cold Harbor.
The video’s description reads, “Historian Gordon Rhea discussed the Civil War Battle of Cold Harbor, Confederate Gen. Lee’s last major victory and a bloodbath for the Union army. The National Museum of the Civil War Soldier in Petersburg, Virginia, hosted this event.”
https://www.c-span.org/video/?523791-3/national-museum-civil-war-soldier-1864-battle-cold-harbor