Here's a little video I did, by request, to briefly discuss the common emitter amplifier. Specifically, it addresses the gain and bandwidth calculations and bench verification of the calculations. Please note that this video is not intended to be a tutorial on BJT amplifier design, but just to briefly present these topics. For a more detailed design-related video, please check out Shahriar's excellent video on the topic on TheSignalPathBlog youtube channel.
Here's my video, for those interested: