rentention

I have now been on YouTube for 1.5 years. I have just 129 subscribers. I watch alot of the how to get more subscribers videos and learn very little from them. Most of the tips I've or even done but still no success. I know keywords can give your videos a major boast? My question is how do I know...

Mine has been slowly but steadily climbing and is now sitting in the 70% range. What is the norm for videos? Is there a range that from YouTube's perspective is considered a "good" view retention level? Thoughts, and Comments are appreciated.