likely has a typo — x26 5 should probably be x265 (the video codec).
It looks like you're asking for related to a specific file: WALL-E.2008.1080p.BluRay.x26 5.mkv . WALL-E.2008.1080p.BluRay.x26 5.mkv
If you downloaded this file from a torrent site or unauthorized source, that is . However, if you: likely has a typo — x26 5 should