The video below begins with when Lets look like Strokes (basically these calls should be strokes). The next portion is when No Lets look like Lets (these calls should not have been called lets), and finally ends with when No Lets look like Lets (these although called no lets are what a let looked like/when a let should be called)
Squash Learn the basic rules and strokes of Squash with www.WatchMojo.com. Squash
If you want to learn the basics of How to Play Squash, England’s Nick Matthew will tell you all that you need to know to get started.