Great job. You had great shots throughout the video, and it was explained well. Only critique-the Kreg tool is a ‘pocket hole jig,’ not a ‘pocket drill.’
Unfortunately, it's no longer available. I would just google it and make sure it's the color and dimensions you need for your frame. I made this headboard about 3.5 years ago and it's still looks great.
So it's not a 1x10 on the top and bottom? Just the bottom? Also you said the height was 25" and you cut the side boards 16". So if the top board is a 1x4 and the bottom one is a 1x10, how do you get 25"?
The can webbing is the more expensive part. The boards are minimal unless you have scrap wood already around. I got the can webbing for $40 but the online shop closed so I'm not sure where to find it for a reasonable price.
To determine the amount of cane I needed, I measured the width of my daughter's mattress and added another foot because I wanted the frame to extend just a bit. The height is just your preference, but I believe it only comes in a few different heights - you could trim for shorter though. Hope that helps!