sounds like a verification that the file is working correctly and is of high quality (perhaps 1080p or a proper web-dl rip).
: The video file acts as a "container" (like an .MKV or .MP4) that holds one video stream and multiple audio streams. game of thrones season 1 dual audio work
Season 1’s dual audio work (providing two or more language tracks on the same release) is a masterclass in what happens when translation meets world-building. Let’s pull back the curtain. sounds like a verification that the file is