Please describe in detail what steps you are taking to cause this:

Which loading-progress-bar are we speaking of?
Unable to play them using webUI/browser/operatingsystem, xbox360? PS3?

The only limit to the Pogoplug is your imagination... and C skills... and linux skills. ^_^ h\t\tp://download.pogoplug.com/opensource/pogoplug-gcc.tar.bz2

I see.

Indeed, larger video files can cause that to happen since Windows likes to create thumbnails for all the movies(if your in thumbnail view).

Try this:
- Change your view to detailed-view; eliminating Windows' auto thumbnail-gen
- Rightclick in an empty area in that WindowsExplorer window, click properties
, click Advanced, Disable the "Allow files in this folder to have contents indexed in addition to file properties"

Hopefully this will help somewhat. If this Movies folder is remote; like you're at work and the Pogoplug is at home, network delay might be unavoidable.

The only limit to the Pogoplug is your imagination... and C skills... and linux skills. ^_^ h\t\tp://download.pogoplug.com/opensource/pogoplug-gcc.tar.bz2