It's not clear from the video whether these are supposed to be storage blocks (e.g. hay, coal, iron), non-recraftable building blocks (e.g. netherwart, hether quartz), or some of each…
I'm not a fan of new storage blocks as they seem like they would largely obviate the inventory management part of the game.
As non-recraftable building blocks; Blaze Powder Blocks are mentioned as giving light (but not how much) and the is no mention of the Blast Resistance of any of the blocks that I could find; this information could be the difference between a good addition and one that is either "meh" or over-powered…
Additional effects are mentioned for Blaze Powder, Charcoal, Ender Pearl, and Signs (that I recall), but – again – more details would be appreciated.
Currently I'd rate these;
Interesting, but insufficient detail (Blaze Powder, Ender Pearl, and Signs) >> possible support
Others look like either storage or decorative (possibly both) >> needs clarification, but tending against
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WARNING: I have an extemely "grindy" playstyle; YMMV — if this doesn't seem fun to you, mine what you can from it & bin the rest.
Lemme review what little text you did give, anyway.
Blaze Powder Block
Nice texture, but in my experience you don't need that much Blaze Powder, it's hard to use up more than a stack so there's no reason to stock up on it, and it's also hard to accidentally get a large amount.
Charcaol Ender Pearl
Charcoal and Ender Pearls were in the other suggestion. These are one of the few I support.
Eye of Ender
Requires Blaze Powder, not really necessary.
Cardboard (made from paper)
I don't know about calling it Cardboard. I'm not really sure when it was invented, though, so I can't really say whether or not it fits in Minecraft's time period.
No need for this from what little text you gave. Just to humor you, I watched your video and only then did I find out that this would let you set two different characters. And only then did I think this would be useful.
Spider Eye Block
I might need this for storage.
and Fermented Spider
I don't think I'd need this. If you want a fleshy block, I'd prefer rotten flesh, which is something that's easy to get a lot of and hard to get rid of.
I get offtopic a lot, be warned. I also often mention a Minecraft clone called Minetest. The clone is nowhere near playable with it's default game in my opinion, but it's at least the start of a good open-source voxel rendering engine, and maybe one day it might be decently playable.