This is a watermark or "slug" used by the site to brand the file and ensure that even if the file is shared elsewhere, users know which website originally hosted or encoded it.
: This generally refers to SkymoviesHD, a popular, frequently changing domain (often ending in .email, .in, .net) used for downloading pirated content. Such sites are notorious for providing movies, including Bollywood, Hollywood, and dubbed content, usually in various qualities ranging from 480p to 1080p Blu-ray [1]. CACWSKMHD -2016- Www.SkymoviesHD.Email 720p Blu...
This denotes the vertical resolution of the video. 720p is considered High Definition (HD) and is a popular choice for mobile viewing because it balances sharp visuals with a manageable file size. This is a watermark or "slug" used by