Sounds like you're trying to understand when the hi hat closes and how loud you really have to make it.
The sheet music at 2:23 in the video clearly shows the hi hat closing on & of 2, on 3, and the & of 4.
In terms of making it as loud as the recording, even Clyde Stubblefield doesn't make it that loud in later live performances. It's probably so loud on the recording because of the exact hats he was using and/or the recording techniques used. Make sure you firmly close the hat after keeping it open for the full 16fh note, but don't get too hung up on making a super loud "chick" sound.
Two things here:
- You first have to master playing the beat to the point that you can do it without thinking about it, then you should be able to work on the feel without having any distraction from the mechanics of it.
- You will never sound like Clyde Stubblefield because you are not him. It's always going to be slightly different. Funk and R&B are the most obvious genres (IMHO) where feel is hugely important so it can be frustrating to never be able to nail the feel on the recording.
What's going on behind the scenes is that minuscule variations in timing and intensity are very important for the feel, and are practically impossible to pin down in order to teach them. You really have to listen and groove with the song and try to audiate the feel and the other instruments while you're playing. Learning to sing while you're drumming helps with getting the feel down. I think this is the hardest thing on any instrument and when you can get the feel (or reasonably close), you know you've arrived.