Step 5) Don't Get Confused
After you click the "Export" button, you will be presented with a very big, very complicated list of options and modifyers that - if you're like me - you have absolutely no understanding of. This is totally fine, but you will have to bear with me as I explain some of the more important ones:
Frame Size: This is the actual physical size of your movie. The bigger the numbers in the parenthesis, the higher quality the movie your export is, but be wary, because this also means a larger file size.
Compression: This is the style of compression that MPEG Streamclip will use for your movie, and for the most part you won't notice much of a difference between the options. I would recommend you just keep it set to whatever the default is.
Quality: While this one is pretty self explanatory, it is also pretty important. Slide the little slider further to the right, and you'll get a higher quality of video (as well as a larger file size). Slide it to the left, and the opposite happens.
Frame Rate: If there is no frame rate (measured in frames per second) written in by default, generally anything above 12 will work for your eyes. If you export at 12 and it's not good enough for you, feel free to up it as you see fit.