What is the difference between standard and enterprise versions of the module?
Standard version of the module allows only one installation on one dotnetnuke portal or web domain. Enterprise version of the module comes with C# sources and allows multiple installation on multiple web domains and dnn portals.
I can't upload my video file to the server
Please make sure you added video file type as allowed extension to your DNN portal (please see the user guide). If you are using DNN File Manager, there might be a restriction for the size of files you upload. Use FTP if you are uploadign a video that is larger than 6mb.
Player keeps spinning buffering icon but doesn't play the video
Please make sure your video extension is an allowed MIME type on your IIS. To check this, just try to access the video via browser navigation bar. If you are getting 404 error, that means IIS doesn't have a MIME type for the extension of your video file. You can easily add it following this guide.
How can I format the Gallery Page layout?
You can use CSS and create a specific container for the module. If it's not enough for you, you can change anything in ascx file (layout, structure, etc.)