As to the hymn with bongos, I recall a thread somewhere here about liturgy in a part of Africa, Kenya maybe, where the local customs/music had a place and that includes some kinds of drums.
Cute. All very well and good. However, please note the following:
1. Yes, the photograph was taken in an Orthodox setting. Where, exactly, within a church, is not clear, but it is not the nave, not the ambon, but perhaps in the narthex.
2. The gentleman in black (he could be a priest, a priest-monk, or a "plain" monk, his mode of dress does not clarify his rank) is indeed playing bongos to an appreciative audience. He is not wearing a pectoral cross, but a laminated nametag, and there are several items protruding from the pocket of his robe which appear to be writing implements. If a priest or deacon, he is not vested in any way.
What can be concluded from this photograph?
1. This is not a liturgical setting.
2. This picture could well have been taken as part of a tour of the church, hence the nametag worn by the priest/priestmonk/monk.
3. No canonical or ecclesiastical approval for the use of bongos, or any other musical instrument should be implied by this photograph.
4. African traditions of song unaccompanied by musical intruments are the equal of anything associated with Orthodoxy (Byzantine, Slavic, Arabic, etc). So it seems that incorporating bongos or other instruments in Orthodox worship in African countries is pointless. Africans can readily adapt their rich and moving a capella
traditions to Orthodox worship.