I made this loom by attaching the fabric pieces to a very large book stand. The book stand can have the angle adjusted but it is positioned vertically even though it doesn't look that way in the video. If you don't have such a fancy books tand try cuttinb a heavy duty box and folding to create a triangular frame.
I happened to have a lot of sticky back felt that was provided by a recycling center program. It is green and I used it to hold the red fabric strands in place. I also got the red felt (not sticky back) from the same recycling center. I sewed each red strand to a horizontal strip of fabric and taped securely in place across the top of the stand. You can't see it because it is covered by the green felt. The blue plastic is cut from the bottom of an old tent.
I wasn't sure whether to work on weaving from top to bottom or left to right but working top to bottom seemed easiest to make and use.
My goals were to improve visual attention, manipulation skills, learn over and under concepts to weave and most importantly to sit up erect and reach upward for strengthening and to improve posture.