New
#31
Why would you not convert a flash video file to a more efficient and proper container? You seem to not understand what a codec is for. If you think you need a codec to play a".flv" file, then you should probably learn about how the actual data in the file is encoded and what a container format is. Windows can thumbnail H264 encoded MP4 files just fine, which is what you should be using. Requiring a codec pack to bandaid poor understanding of multimedia files isn't a useful solution.
Using a media player that isn't chained down by software patents and intentional self-deficiencies is a far better option in the long run.
If the OP was asking about thumbnails, you might have a good point, but the OP was asking about videos playing in the browser. A codec pack won't help much there. VLC does however have in-box plugins for Chrome, Firefox, and IE if I remember correctly.