Subtitle Stardust.2007.1080p.720p.bluray.x264.[... ⟶

Refers to the vertical resolution. 1080p is "Full HD," while 720p is standard "High Definition."

This is the compression library used to encode the video into the H.264 format. It is the industry standard for balancing high visual quality with manageable file sizes. Subtitle Formats and Compatibility subtitle Stardust.2007.1080p.720p.BluRay.x264.[...

Indicates the source material was a physical Blu-ray disc, ensuring high-fidelity image and sound compared to "Web-DL" or "DVD-Rip" versions. Refers to the vertical resolution

The string of text in the title provides specific metadata about the video quality and source: subtitle Stardust.2007.1080p.720p.BluRay.x264.[...