Hey, first post here.
My cash flow off of my content (I actually have well over a thousand videos I own the copyright to, and don't know if I fit the typical blackhat mold), but have recently hit a similar scenario that almost suggests a penalty has occurred across 5 channels at the exact same time. I'm pretty sure that it may have been tag related, as my tags & whatnot were very similar across all 5. I lost somewhere close to 150-200k views daily from "suggested video box" views. I actually maintained my search relevancy though, which kind of really confuses me. Right now I am trying to get all my channels indexed again. Over the next few days I'll start doing video indexing. That being said I expect that if similar tags/descriptions/titles will raise an eyebrow may be connected to some kind of penalty or reduction in suggested video relevancy. Either way, I found some of your insights helpful. I'll let you folks know if the index trick helps. pm me for details on stats and such, I never bought views/GSA'd/etc but am experiencing similar effects. I'm trying to compare and see if I can pinpoint possible fixes for this crash.
thanks.