Almost two years ago I did some experiments with a Proton Exchange Membrane or PEM fuel cell. Only a few companies actually make these membranes. This fuel cell came out of a science toy called a Hydrocar. The highest current I ran the cell at was 4.5 Amps while producing 36 sccm of hydrogen gas. In the video you are looking at the water and oxygen gas side. To reduce internal resistance the PEM is in contact with a diamond shaped metal mesh that is unfortunately not stainless steel but probably aluminum. I have seen other fuel cell that use a perforated SS foil which I prefer. The syringe is used to circulate and separate the O2 and water which keeps the membrane wet.
http://youtu.be/huiVgMdcNXQ
http://youtu.be/9DKmkQrZ9Rs
-Peter