I have comments on op's trap after which I have comments on feral hog control in general. I don't mean to beat you up,more so help you catch more hogs. The boar in your trap is 100% domestic that hasn't been free for long. A hog that size born in the wild would go berserk when anyone approached and run through your trap like a screen door. Some smaller ones in first video are possibly offspring of boar in second vid and the sow was probably domestic blood as well. The Hampshire influence would be gone by the second generation if interbred with Eurasian blood. What that tells us is someone is releasing hogs and should be prosecuted or whipped.
I would suggest building a strong pen at least 16'x8' with root gates or saloon gates. First gate entering a 4'x8' section and a secouund gate from there into main pen. Your present trap could be improved by putting a board or plywood along bottom to make it easier for hogs to lift gate and enter after it has closed.
To do meaningful control requires cooperation of everyone in a large area. 25 sq miles at minimum, larger is better. Sounders travel and might tear a field up in one night then be gone for weeks before hitting same or adjoining field again. For that reason a Facebook page or bulletin board in a public place is a lot of help. Every time the sounder is seen,time and place is posted so that trappers know when they are heading their direction to bait traps. Time.place and number trapped is posted as well. County Commissioners and state authorities should be lobbied to pass ordinances forbidding transportation of live or release of feral hogs. An ordinance should forbid release of domestic or imported hogs into free range.
Where a guy has a small place and no community cooperation, chasing them off with dogs is more effective and easier than trapping.