A few weeks ago we posted here with a simple challenge: 100 new YouTube subscribers and 100k views. We were never going to get the views but managed to get the subscribers... and it looks like the trend still continue for at least a few months. It was achieved by simply posting a few of our own interesting videos.
We're not very active on YouTube so it was a good platform for the content-based experiment. Next time we repeat the challenge we'll set the goal at 1000 subscribers
It's worth noting that Yabber includes a ton of YouTube features and returns very detailed statistics.
More info to follow on our website.