ImTOO Video Joiner
ImTOO Video Joiner is a smart application allowing you to merge files of different formats.
23.7MB
20,088
Windows Movie Maker doesn't support FLV files, which is why you're having trouble viewing them.
You can either convert your FLV files to a format that Movie Maker supports, such as MP4, or try using a different video editor that handles FLV, like VSDC Free Video Editor or Avidemux. Both are listed on CODECS.COM.