How do I play mp4 files?

If the mp4s don't work with your current system, it's probably because you don't have the proper codec to play X264 codec encoded videos.
Most people, including us, recommend downloading the CCCP (Combined Community Codec Pack). It has lots of codecs that can be used to play many kinds of files. You can get it here:

http://www.cccp-project.net/

We recommend using VLC player for watching the releases, it's compatible with most kinds of files. You can get the latest version here:

http://www.videolan.org/

You could also try players like Media Player Classic, or Windows Media Player.

This Q&A was found on Anime-Destiny - Mienai Tsubasa : http://www.anime-destiny.org/modules/smartfaq/faq.php?faqid=20