A video that has been downloaded from the Internet is not likely in the uncompressed or lossless type of video format expected by a professional non-linear video editor (NLE) like Adobe Premiere. The older versions are even less friendly towards compressed formats.
You'll have to identifiy what sort of video/audio codecs are in use here. It's probably Flash On2 VP6, Windows Media (WMV), or H.264
There's a number of possible formats.
Use Gspot: http://www.digitalfaq.com/forum/vide...-analysis.html
Then convert it out to an uncompressed or lossless format (like Huffyuv
), using something like Avidemux
All of that is freeware.