This video offers something instructive about the president of the United States.

Critics of this blog will see this as a nitpicking, trivial observation. Perhaps it is — at some level. At another level, it illustrates to me that the president doesn’t quite grasp the notion of “service to one’s country.” At least not yet.

He pinned a Purple Heart medal on U.S. Army Sergeant First Class Alvaro Barrientos. Donald Trump said that when he heard about the award ceremony, he wanted to “do it myself.” I give the president high marks for wanting to honor the young man who lost part of a leg while fighting for his country in Afghanistan.

But then he said something I find weird. He offered SFC Barrientos “congratulations” for receiving the medal.

Congratulations?

To be fair, I don’t know what the president said to the young soldier privately when he whispered to him. Nor do I know what he said to his wife, who stood nearby while the president pinned the medal on SFC Barrientos’s shirt.

But the public offering of “congratulations” to someone who lost part of his body on a far-away battlefield is inappropriate.

I don’t need to remind the president that the soldier didn’t compete for the medal. He didn’t want to be maimed. He served heroically. He deserves a nation’s thanks and gratitude … not its congratulations.

My hope is that the president learns the ins and outs of these public ceremonial events. No, they don’t shape public policy or have tangible impact on the lives of anyone other than those who are taking part directly in them.

The optics, though, matter … a lot!

Sergeant First Class Barrientos? Thank you for your heroic service to our nation.