Regarding "useful features," this may refer to the technical aspects of the file format or specific highlights of the series itself: Series Highlights ("Useful" Narrative Features)
For those looking to watch the season through official channels, it is available for streaming on ITVX or for purchase on platforms like Amazon Prime Video and the Apple TV Store. Vera Season 1 - Prime Video Vera.S01.HDTV.XviD
The content was captured from a High-Definition television broadcast. Regarding "useful features," this may refer to the