The Classical world such as oracle of Delphi

The lovely and shy young woman, who is so reluctant to give a teaching that she hides her head in her hands when the students sing a song of request, is the same woman dancing fiercely in front of many monks. She is Khandro-la, Rangjung Neljorma, the Tseringma oracle.

When Tseringma, a deity subdued and bound to oath by Padmasambhava, is invoked by the monks, Khandro-la enters a trance and channels the deity to give predictions to the high Lamas. Oracles of this sort were also familiar to the Classical world such as the famous oracle of Delphi.

There are many oracles in the Vajrayana tradition. The last clip is of the Nechung oracle, who is also a very quiet and humble monk normally, who would not be able to move under the weight of the ritual headdress worn while he is in a trance.

(I would avoid videos of the controversial Dorje Shugden oracle)