Sorry to dissappoint you guys but it seems people just want to believe what they WANT to believe based on a small clip but Pep does even not seem to be looking at Dr. Han-Wilhelm Muller. Over the years i have notice Pep is one of those coaches who is highly animated on the touchline. His body language can be highly comical at times. He was probably just bemoaning his luck or tactics to his coaches, just like LVG was shouting at Giggs.
Dr. Muller has long hair and looks like this.
These are his assistant coaches Germant and Torrent. The bald guy is obviously ex Germany internationl Sammer who is their sporting director.
Who is he clapping at? Certainly not his medical staff i don't think so!