Right. So it boils down to your opinion that it is OK to dance and sway to and fro joyful music, and to clap your hands in a Charismatic fashion in the OO or in the EO Church, but not in the RC Church?
Sometimes it helps to read the comments of the uploader, Stanley: "This is a time of praise following the conclusion of the Traditional Coptic Liturgy." (emphasis mine)
In the Coptic Orthodox Church, there is a strict division between the hymns that are appropriate for the liturgy and those that are not. The latter can include a bit of everything, so long as the message is theologically acceptable (as you can see if you search for "Coptic taraneem" on Youtube...pianos, guitars, drums, oh my!).
And Stanley, in that YouTube video you presented, the Pascha Divine Liturgy had just concluded in the African Byzantine Orthodox Christian Church.
The people and priest were singing Christ is Risen using the same popular American hymn (sing in Russian and Antiochian Orthodox Churches) as the people were processing up to greet the Priest, to receive his blessing and some antidoron. Yes, they were swaying to the beat of the music, but they were truly joyful in celebrating the Great and Holy Feast of Pascha, the Lord's Resurrection.
Personally, I would much rather that people sing as they go up to greet the priest after the Divine Liturgy than gossip and engage in small talk in the Temple of God.
No, I did not say that at all. Stop reading into my post.
Here in the USA, in the Orthodox Church, we do not use drums, guitars, and clapping. Only the human voice.
True, some of the Greek Orthodox Churches use an organ, but normally, we sing without any accompaniment.
However, the African culture has always had clapping to the beating of bongo drums.
This has probably been their tradition for thousands of years since the beginning of Christianity.
Respectful singing without drums and clapping used to be the norm in the American pre-Vatican II Catholic Church, but in Africa, things were always different. When I was a Catholic, it was not until sometime in the 1970s that clapping, bongo drums, and guitars were introduced.
Before that time, like the Greeks, Catholics only allowed organs. Convents and monasteries often did not usually have organs, but used Gregorian chant without any accompaniment. The quietness and reverence of Gregorian chant was angelic.
Liturgical dance at Novus Ordo Masses is a post-Vatican II innovation/abuse. I do not think that it is allowed by the Vatican.
NOTE AGAIN. The swaying to the music in the African Byzantine Church in the Pascha YouTube occurred AFTER the conclusion of the Divine Liturgy.