Yes, it is perfectly suitable. 11 DVDs fit exactly into 1 "compartment" and the shelves are a few mm shorter than the DVDs are wide. :)

Don't know exactly, but mine was full of paperbacks and hardbacks and I had no problem. Must be fixed. The problem would not be the shelf but how to fix it to the wall.

Steel has become expensive 🤣

The best way to use the space is to stack the books horizontally (French way of storing books).

We fixed it to the wall with good screws and dowels and loaded it with books far beyond the top shelf. The weight is held without any problems.

No, the distances between the shelves are fixed. You push the elements into pre-milled slots (4 cm) in the back bar. 2. I can't say, but why bend them? The shelves give a little with the weight of the books, but they fit well. 3. the assembly is not complicated, I threw it away. The back bar is 5 cm wide and 5 cm deep. It has a hole at the top and bottom (each 10 cm from the edge) for hanging screws. I can't tell you the size, but you can work it out with the weight of the books.

12 kg.

Yes; that works