Listen to this start up how much faster the healthy cranking happens:
this is why I think the issue might be related to the starter system.
On your video do you keep the key in the start position constantly? Is the crankshaft sensor connected at that moment?
There is no mechanical blockage around the replaced parts right? Nothing that would make turning the crankshaft harder?
Connect the engine block to the chassis with a thick cable to make sure the grounding of the engine is o.k.