Why do arachnids/insects move in low-frame-rate-like quick burst movements?

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I saw a video of a spider recently moving about and it’s movements were very jerky, almost as if each time it moved a limb about a degree there was a “stopping point” so to speak. It seems their articulation is limited to specific distances, each of which happens in rapid bursts rather than one fluid motion like a human’s. Is this some reflex related thing? Like a limited speed of neurons or ~~quantified~~ proportion of neurotransmitters?

Edit: I’ve seen this with other insects as well as other spiders, even irl. I don’t think it has anything to do with actual camera framerate. It has something to do with arachnids’ and insects’ limited articulation.

In: Biology