Daf Yomi -Yoma 50 - Floating or Circling?

The classical pshat in the kohanim reciving an anotement only מקופיא is that it is floating or hovering over the korban and not an actual כפרה. Rabbeinu Chananel learns it in a different way. He states that מקופיא is derived from the word הקפה - circle or surround. Therefore he learns that the kohanim are only considered partners from the time of ווידוי - confession, when they all gather around to hear it. It comes out that after the ווידוי, the kohen gadol would certainly not be allowed to make a תמורה from it, because by then everyone would be considered the בעלים.