My 8mo has been signing milk (inconsistently) for a little over a month now, and this is the first time I've managed to get it on video. I was actually trying to get a video of him crawling (which he's just on the verge of doing), but he made his way to the couch, rolled onto his back, looked back at me and signed "milk". He then scooted to the edge of the couch, right to the spot where I always sit to nurse him.
I was really excited to get him on video, finally! :-D