re: Video of old Civil War vets performing the "Rebel Yell"

Some have another name for them. I found it interesting that when they all walked in, they passed through a gauntlet of American flags. BTW, my great great grandfather was a Union soldier from Wisconsin and fought in the Battle of BR, among others. I have read some of the accounts of his regiment, but do not recall comments about being scared off by the rebel yell. I liked the old footage, nonethless.