Ha! That's me in the video! I've done it both ways; starting with feet on the block is slightly easier (for me at least).
The direct version is supposed to eliminate the hanging block. The description on UKC basically says something about not using the pockets of Ian 's Roof and so I wondered if this rule meant for feet too, but the chap who put up the eliminate version explained on the other channel that he included that info to stop people traversing into Ian 's Roof and claiming a tick of the Houdini eliminate!