It sounds like you're looking at a 720p WEB-DL digital release of Supergirl Season 1
Subtitles (EN-SUB): This release includes hardcoded or muxed English subtitles, which is a standard feature for international viewers or those who prefer following dialogue with text. Season 1 Content Review --- Supergirl Season 1 Complete 720p WEB-DL EN-SUB X264
Title: Supergirl – Season 1
Version: Complete Season
Format: 720p WEB-DL
Video Codec: H.264 (X264)
Audio/Subtitle: English audio, English subtitles included (EN-SUB)
Source Type: WEB-DL (web download, typically from iTunes, Amazon, or Netflix) It sounds like you're looking at a 720p
Melissa Benoist shines as Kara, perfectly balancing the awkwardness of a young professional with the unwavering hope of a superhero. typically from iTunes