In general, the Quicktime movie file format is a great was to work with movie files on both Apple Mac and Microsoft Windows computers. The format supports a wide variety of different video compression codec formats within a '.mov' Quicktime movie file.
However, some video output devices or programs that support the Quicktime movie file may do so in an incomplete or technically incorrect way. Which might result in a quicktime movie file that does not open in Studio Artist for some reason. If you ever run into this situation, The Quicktime Player Pro application is a great way to perform format conversions on Quicktime movie files. So opening the problem quicktime movie file within Quicktime Player Pro, and then exporting to a different compression codec usually resolves the problem.
Many users choose relatively high bandwidth compression codecs, or uncompressed video formats for their initial rendered output files, in order to get the maximum output quality. Again, Quicktime Player Pro is a great way to take those large bandwidth render files and convert them into a different lower bandwidth compression format (like H264) for upload to web sites. It's a great utility application for doing video format conversion. And can also be used for simple video editing as well (including grabbing subsections of a larger video file to output as separate smaller files that you may want to use for processing within Studio Artist.
One other issue to be aware of is that on Windows, there is no way for an application to know if a movie file is a quicktime movie file unless there is a '.mov' file extension added to the movie file. So you need to make sure you do this for any files you generate from Studio Artist, or get from any other sources, so that the associated applications know which file type they are dealing with when they try to open the file.