Your video doesn't details the ponds' sizes or orientation like an aerial image. The below images might help put things into perspective from a time-line standpoint and allow more accurate comments & suggestions.
What is glaringly obvious is the significant increase in shoreline trees and surface "weed" growth between 2006 and 2010. Appears to be a classic example of eutrophication.
BTW: Try switching to 8 or 10 lb mono on the spinning reel; and tie on a 6" smoke-gray Senko worm, "Texas rigged" (weedless) without a weight - worked slowly using a similar technique to that shown in your video.
