Good video! Im going to try his trigger design.
There are any number of trigger designs that work well depending upon how the door of the trap is set up to fall/close and the size of the trap.
Triggers that depend on the hog to bump/run into them....can be hit or miss with respect to how many you catch. The perfect scenario would be a Sow with young.
You can broadcast the corn about the trap to spread out the young pigs, then put a pile in the back near the trip wire and the dominant hog (in this case the sow) will claim it. Enough movement back there and she will trip the gate.
With larger hogs (especially those that are trap shy or just reluctant) you can have one enter the trap and set it off before any of the others decide to go in. So...the type of trigger you use and how easily it trips the gate/door should be considered.
It was said not to use 'cable' because the hogs will tear it up and this is true IF you don't route it correctly. I wouldn't use cable in small traps as depicted in the video or use it as a bump type trigger. But you can use cable in a 'root' style set up. It is all I use in my pen traps.
It was also stated they hogs do not have 'eye shine' which is not entirely true. It IS true that hogs lack a 'Tapetum' so you don't see light reflected from their eyes like you would animals that do have it. But....at closer ranges 100 yds or so and at the certain angles you can still see some eye shine just off the lens of the eye. I'm not trying to pick apart the video which I thought was well done, just offering some different observations....having been trapping and hunting them for over 30 years.