If you simply want to go the top of the list of recordings (the most recent one) then when you have pressed the blue YouView button, scrolled and highlighted the "MyView", simply press "OK" twice. once to get into "MyView" (it will always default to the recording list once you have pressed "OK" after highlighting "MyView") and the second press of "OK" takes you straight to highlight the top of the list, this is also the same in any menu on YouView. So by my reckoning that is 4 button clicks to get to the top of the recording list.
Not sure where the 2 button presses come in, as it depends on how many recordings you have on the box, to highlight the open you were watching, as the YouView sorts them in date order, with the most recent at the top.