Sorry I missed that on the video. Old age you know. Of the shifters available Steeda from what I found was one of the two with fewer issues on the MT-82. Had you said MGW I would not make the following suggestion because I know of zero issues with that shifter. I ran one myself and had no problems with it at all.
I would put the factory shifter back on the car to see if the problem is being magnified by the Steeda shifter, or for that matter being caused by the shifter. Any shifting problem inside the transmission will be greatly increased with a short throw shifter. 1-2 shifts on the MT-82 were a problem with some people. I personally never had any issues, but then again I only had 20K on mine when it was traded, but it was seeing 568RWHP and made trips to the track.
As I recall the Steeda Triax uses the factory shift housing. The factory rear bushing support for the shift housing could also be worn and need to be replaced. There are some aftermarket options that will work with the factory shift box. I think Steeda makes one but I am not sure as I do not use their product. Factory bushings inside the shift housing that support the shifting rod could also cause binding.
Changing the tranny fluid will be suggested so I will get that in now. It has helped some folks with that 1-2 shift. I stuck with Ford fluids but again had 1/3 fewer miles on mine and only changed the fluid then as a planned maintenance routine.
I assume the clutch feels fine and has no issues shifting through other gears so I see no reason to go there.
I'm sure others may have some advise who know the inner workings of these transmissions as well. I know some common issues they have had but wish to not paint a grim picture until more common things have been checked out. Good luck. Keep in mind it should still have some of that 5/50 warranty on it... barely.