Is this normal bottom bracket spin?

I see no problem here.

New bottom brackets are well greased. The grease adds a bit of friction to it. The friction will become less with time.

It’s normal to not spin for an extended period of time. There’s actual bearings in there, the plastic that you see is the outer seal. The plastic shields the bearings, plastic actually is quite durable and doesn’t corrode. What you see on the internet is either ceramic bearings or under greased bearings. Ceramic bearings are also under greased, but for functional purposes and require more servicing in most cases.

Bottom bracket spins are not an indicator of the quality of the bottom bracket.

They can indicate that the preload is too high if the crank barely spins. This is why you want preload only high enough to eliminate play, and no more. (cranks with insufficient preload will spin much longer, but the BB will die much faster!)

They can indicate an issue with the construction of the BB shell if the crank has noticeable sticking points and/or doesn’t spin well even with proper preload. (There are multiple possible issues such as the frame needing facing, being misaligned in one or multiple ways, or being malformed, etc.)

They can indicate the amount of seal drag of the bearings. All things the same, a better sealed bearing will spin less. However, you want bearing sealing! A bearing with little to no sealing will fill with grit quickly, massively increasing drag. A bearing without grease can also spin faster/longer, but running a bearing dry is a dumb idea in a bottom bracket.

Bottom brackets are not meant to perform with next to zero load, such as in a crank spin test. This type of test does not meaningfully say anything about the quality of the bottom bracket. It can expose issues, but it is not, despite the attempts of shitty channels on social media, the dick measuring contest most people think it is.

Yours looks just fine.

As opposed to the guys saying “looks good”, I’m seriously underwhelmed.  I mean, it obviously works, but that does not look great…

Strangely my Shimano 600 tricolour and Dura ace cup and cone BBs spin more?🤔🤔