The nipple style has its own problems. I can't use it. You have to have excellent control, where you can stop and start, and a lot of us can't do this. You can easily overflow, imo.
I haven't seen a video on how to make this one. I tried to do this and did succeed. You use a baby bottle nipple. That's what they use. It's just a tube with the nipple attached. The problem is connecting these things up. Tranzwear has pieces that you can put in a packer. I'd recommend that, unless you are good at making things. The problem is connecting up stuff with various tubing (hardware or aquarium store).
--Jay