When you first scroll down on the logged in homepage (feed) you get to the footer. It is only after you click "Load more videos" that we begin infinite scrolling.
I think this makes it less intrusive since the user is initiating that they want to see more (rather than clicking on a link in the footer for example).
See: http://cl.ly/image/1d3L3H3c0P2q
On top of that we use html5 push state to make sure that the current url is updated as you scroll up and down the page with infinite scroll.
I'm not saying this solution is perfect, but it has seemed to work fine for us.