Agreed. This reminds me of the 911 truthers. Trying to make something from nothing.
You can’t hear the words, but you can read the expressions on their faces clearly. They are mocking something. You can argue about what they are referring to, but unless you are blind, you can’t miss their condescending attitude.
Even if they are amused by some silly screw up in the ceremony, it wasn’t the time or place to pass jokes between them.