This is a clip from class #10 of Ustaadh Moosaa Richardson's classes on Usool as-Sunnah (Foundations of the Sunnah in Creed) by al-Imaam al-Humaydee (may Allah have Mercy on him).

A strange new error has appeared, that when one prays sitting, he intentionally does not lean forward for rukoo' or sujood, but rather he only nods with his head for those positions, while being able to bend forward. Ustaadh Moosaa explains this is erroneous and baseless. (1447.06.15)