So many armchair critics, lol.
I know I'm late to the party, but I thought the clip looks stunning. I don't think the spider is distracting at all. Dagobah is a swamp filled with who knows how many lifeforms. I think it's a great establishing shot, immediately giving us a feel for just how teeming that swamp is with life. The spider is very slow moving, and it's not what I consider distracting at all. Sure, everyone is noticing it now, because it's new, so of course everyone is focusing on it because they're used to it not being there. That doesn't mean it's a bad thing that you notice it.
I don't think the shot is too long, either. Seriously, we're only talking like an extra second or two. Just how short are people's attention spans when they think an extra second or two drags the scene out? i think the extended shot is nice because it gives your eyes time to take it all in. Often in newer Hollywood films I find myself wishing they would give me a bit more time with some establishing shots, instead of rushing through everything so fast I don't even have time to take it in.
I'm amazed at how seamlessly that shot blends in with the film. Great job as always!