jittery

adj

1. nervy, jumpy, on edge

   “Those were all landmark moments to cherish. Just as appealing was the manner in which Alex Oxlade-Chamberlain and Milner cut swathes down either flank, albeit through flustered full-backs who had looked poorly positioned and horribly jittery from the start.”

2. Having jitter, or unwanted signal characteristics.

   “jittery video playback”