: Refers to the video resolution (Full High Definition,
: This is the title of the content. It likely refers to a song or a specific scene/clip.
Files with this exact naming structure are common in high-fidelity "remux" or high-bitrate encode circles. The phrase in your request might refer to the presence of hardcoded subtitles or specific on-screen graphics that are not removable, as opposed to "soft" subtitles that can be toggled off.
: Indicates this is the second track or file in a specific folder or album sequence.
: Standing for Digital Theater Systems , this indicates a high-quality multi-channel audio format often preferred for its higher bitrates and surround sound capabilities. Contextual Meaning