Having grown up in Iowa farm country and learning to drive on tractors, double clutching was just part of the drill. Every shift on a tractor was double clutched - no synchros - none.
Of course most of the time you chose a gear and started off down the field because all but road gear were so low that you could start from a dead stop in all. But when pulliing a loaded feed wagon or hay rack, you had to start out in 1st, double up to 4th or 5th and once you got out of the field to the road, it was time for raod gear. Up shifting was easy.
Once you got to the barn and it was time to start down shifting, that's where the skill came in.
We also had a WWII surplus, 2 ton truck with a grain box on it. It was a 5 speed, no synchro tranny with a 2 speed rear end. What fun to stir that box. Every shift a double clutch with split shifting the rear end as well.
My grandpa didn't double clutch, just ground the gears together on every shift.�

The rest of us learned to shift without a crunch.
I can drop the 3B or the Wagon into 1st at any speed below 10 mph. Above that it's kind of hit or miss.
Bring on the video.