[link removed by moderator]
I downloaded various episodes from the Legend of Galactic Heroes here but I can’t get them to play no matter what I open them with.
Is that a legal site or pirated stuff?
.mkv files will play with VLC media player, which you can download from here
You do already own legally obtained copies of these files?
I’ve downloaded VLC and it says:
That type of error tends to mean that the files are corrupted or bogus. “undf” stands for Undefined, I believe. If the video and audio are not defined, they can’t be played.
Whatever you do, do not play them in Media Player–they may try to load viruses by using a fake codec.
Alright thanks. But other people who downloaded those files seemed to have those movies playing fine. 
There are illegal torrent files ? :eek:
The 4th and 5th in the list are collections of .mkv files which VLC player will play with no problem. Which torrent did you actually download and which operating system are you trying to open them in?
Did bittorrent fully download them? Many clients will pre-allocate the download and not append the file extension, so they look complete. That’d explain why VLC isn’t liking them.
[moderating]
Since (a) several people have reported this thread saying that the link goes to an illegal torrent site, and (b) it looks like the question is answered, I’m breaking the link and closing the thread.
[/moderating]