I noticed there seems to be a problem with structures and the little bag, I don't know if it's my structure specifically but I used less than 1 block of little storage block to make a chest, which also consists of a door and fixed structure all in one structure. The first problem I noticed was it told me I don't have enough little storage pixels to place the structure, even though I had the whole block in my inventory and the structure used less than a block. Then I noticed after getting a second block of the little storage blocks I was able to place the structure. When I broke the structure and put it in the little bag it gave back more little storage blocks than were used.

Unfortunately I can't view the video. Can you export your structure and send it here, so I can test it myself?

I had converted the video using VLC (and it played through there) I'm not sure why it didn't work sorry about that but here's the structure
simplechest.txt

Fixed in the newest version. Thank you very much for sharing issue! Your description made it very easy for me to reproduce and fix it.