Actually the harryabreu's video is not the best way to approach this. If you need to have that hole perfectly round, you have to take the approach in the .hip I've attached.
As a side note, the video reveals at least two unpleasant realities: one it shows how inefficient is modeling using radial menus or any other kind of menu, instead of hotkeys; and two, how incomplete and thus disappointing, for me, is the newly re-written PolySplit tool.
Edited by anon_user_89151269 - May 10, 2017 05:27:06
@Jim If you can't find the “make circle” option, just press “T” to auto create an edit node and then RMB outside the gizmo area to have the menu with that option open. Hotkey is “shift+C”.
Edited by anon_user_89151269 - May 10, 2017 03:10:07