The First video is by Michael Voris:
This next video is a demonstration by a Russian Orthodox Patriarch on how Eastern Orthodox Christians make the Sign of the Cross:
Lastly, here is a video of three Protestant gentlemen explaining why they make the Sign of the Cross, although not required in Protestantism (watch at your own risk):
While (High Church) Anglicans and Lutherans are the only Protestant denominations that include the Sign of the Cross in their liturgies and encourage it to be used during morning and evening prayer, it's not widely used among Protestants.
The Roman Catholic Church and the Eastern Orthodox churches are the only ones that require the use of the Sign of the Cross during liturgical and private prayer. Even babies who were just baptized are required to learn how to sign when they are ready to.
It would be really appropriate for American Christians to make the Sign of the Cross before they place their right hand over their hearts for the National Anthem and Pledge of Allegiance.
Sadly, today's Novus Ordo people make the sign very sacriligiously. The rush through the thing like it's no big deal. I admit, I rush sometimes, but never in church. Therefore, the Sign of the Cross is to be made reverently, thoughtfully, and enthusiastically.