I prefer to join those flv videos again if I happen to download the videos from Youtube. It simply means a better viewing experience because I’m able to watch it without having to click on the next part every ten minutes or add all videos to a playlist before starting the playback.

The easiest way to join flv videos is to use a software called Avidemux. With Avidemux you open the first part of the video and select Append from the file menu and select all additional parts of the video this way. They will simply get appended to the previous part(s) and you can use the Save video function to save the joined video which contains all parts.

A good indicator that a part was added is to look at the playtime of the video which should increase by about ten minutes for every part that you add to it. The video is saved again as a flv files and the procedure does not take longer than a few seconds if you save them as flv as well.

You could also convert them to avi for instance by assigning the avi file extension to the filename that you want to save.

I have been using VLC Player which supports flv files until I found a even better player named SMplayer. Both of these players play flv files without the need of an extra plugin or codec.

There is also no need to convert the flv files into another format unless you would like to burn them on CD or DVD. If you have been looking for another reason to make the switch from your favorite player to a better one try SMplayer, this one really rocks and plays almost everything out of the box.