I did watch the video of the blocks making. Honestly, it's really confusing. I can't follow you at all in those instructions, side 1, side 2 , grain, etc... Do you have another video about it?
You can use a band saw and not follow the grain. I'm showing you how to make them by hand with that specific grain. Because that's the hardest way, and how Stradivari did it.
There is only that video for the corner blocks, can you tell me more what so confusing about it?