I have watched this before, so the factory HID's come out the same way as Halogens? Not trying to be a smart a$$
No they do not (not smart ass at all), because I didn't learn the answer to your question until I did it myself.
You can use the above video and all is the same to get access to the low and high beam bulbs, but in the video above the low beams are not factory HID's. Actually removing the factory D3S HID bulb is a little different process.
So the socket of the bulb has a white twist lock collar on it with tabs on either side, the tabs are there to just assist with being able to twist the collar. The collar is some what of a circular U Shape, and you have to twist it loose(to the left) then pull up on it to remove it, once this is removed the stock D3S bulb will come out of the socket (the bulb may come out without the white collar being completely removed, but it will for sure be loose), you can now un plug the D3S HID ignitor plug. Connect the new D3S bulb to the HID ignitor plug, you will then line up the tabs on the base of the bulb with the back of the socket. This is when it gets tough only because it's a tight squeeze. At this point you'll need to use 1 hand to hold the bulb in place and sit flush into the socket, while you use the other hand to push down and then twist the white plastic locking collar back on. Once on twist right to tighten up and you are done.
Use gloves and avoid any skin contact to any of the glass on the HID bulb, wiping the new bulbs down with alcohol swabs before install to ensure they're completely clean isn't a bad idea either.
Hope this helps.