Thanks for the video, helped a bit with figuring out inline variable substitution. However I am going to make a suggestion : in future videos, please consider avoiding spaces in the filenames! While having spaces in filenames may function for some aspects of GIS, they can cause a myriad of problems in others, and should generally be avoided. The underscore ('_') is the usual character to use instead of space in a name, as it is most compatible with limitations of various data storage formats and requirements of other software. If you ever do any python scripting in ArcGIS, you will understand very quickly why this is such a big deal!