Lewis's Woodpecker juveniles-video clip 2

This clip gives a nice view of the juvenal plumage of these Lewis's Woodpeckers including a good look at the of the warm chesnut tones on it's head. According to "Birds of North America" online there is considerable variation in juvenal plumage in birds in these post-breeding flocks but does note that "feathers of hindneck have white subterminal spots (not present in adult....)"--these white spots can be seen if the video is stopped when it's back is to the camera. BNA also notes that the tail feathers are more pointed than in adult plumage a feature seen at the end of this clip. One of the woodpeckers flies over to the top of a snag and has what looks like a winged insect in it's bill. It proceeds to either cache this food or try to dig more insects out? I have watched this clip over and over and cannot tell whether it is food caching or finding. This species is known for caching acorns in tree crevices (tho I didn't find anything about them caching insects) as well as using their bills to located insects in broken/open parts of snag trees. Does anybody have experience with this? SeEtta