I've had a technology-niche YouTube channel for a little over a year now. I have about 350 subscribers. I have three videos with over 5,000 views and the rest (about 25 videos) are between 60 and 500 views. I've noticed for a few months now that my subscriber and viewer growth has greatly decreased and I haven't been able to determine why. This morning I created a dummy account and perused YouTube searching for my content. Without directly searching for my channel name, it was extremely difficult to find any of my videos, even the ones with 1000's of views. I subscribed to my channel and noticed that in the subscription feed, only 2 of my videos were appearing there. I also visited other channels I was networked with (in the same technology-niche) and my channel was not appearing in their "Related Channels" section, but they were appearing in mine. Even channels with fewer videos and subscribers were appearing in their "Related Channels" section. I've had relatively successful YouTube channels before and I've done enough research to know and understand how to title and promote my videos. The only thing I can surmise is that I've done something to penalize my rankings. I use a fairly aggressive tagging strategy, using keywords in my title, description, and the tagging section itself. I also have tags in my "channel tags" section. Could this strategy be causing the hand of Google to come down on my channel?