For the last time, we didn’t cut out the OP and ED. We used something called “ordered chapters”. This means that the OP and ED are in separate files (and are magically linked to each episode so they play normally). It helps to keep you from having to download an extra 100MB with each episode, saving bandwidth and disk space.
HOW TO PLAY ORDERED CHAPTERS:
a. For Windows: Install the latest verson of CCCP (2013-05-30, or later). As LAV Splitter now supports segment linking, ordered chapters as well as multiple editions with Matroska, you can just use the default setting.
a1. For Macs, download MPlayer OSX Extended rev14 from here and an up-to-date binary of mplayer2 from here. Install, and check that subtitle scale is set to 100%.
a2. For GNU/Linux, use this build script to create a working MPlayer install that supports ordered chapters, or follow this guide to install mplayer2 [recommended]. If you’re an experenced user, also check out mpv.
b. Put the episode in the same folder as the OP and ED files. If you do not have the OP and ED files, they’re most likely in the torrent for episode 1 of the anime you’re trying to watch, or on the IRC bots.
c. Open the episode using Media Player Classic, or the mentioned player. It will play normally.
Some people have asked this, and yes, you can rename the episode and OP/ED files and the ordered chapters will still work, as long as everything is in the same folder.