These are the audio format and the file container type.
A watermark for the website where the file originated.
This usually means Season 2, Episode 3 through Episode 4.
This refers to the video resolution (High Definition) and the compression format, which allows for high quality at a smaller file size.
Files from sites like these often carry significant risks of malware, viruses, or phishing. It is always safer to use official streaming platforms to watch content.