What's MPD Video? How to Save MPD as Video Formats Like MP4? Answers in One Place

A media presentation description (MPD) file is a text file that describes how an MPEG-DASH video is streamed, and it is used to hold the information on the various streams and the bandwidths they are associated with. In your video source (src) attribute you point to the MPD instead of to the media file as you would with non-adaptive media. The MPD file tells the browser where the various pieces of media are located, it also includes meta data such as mimeType and codecs and there are other details such as byte-ranges in there too - it is an XML document and in many cases will be generated for you. Meaning the MPD files you downloaded from various video hosting sites like Reddit are nothing but descriptor files and cannot be played on any platform.

There's no possible way to convert MPD to MP4 format since MPD video file is neither an actual video format nor contains any valid video stream. Instead, you can track back to the video on the internet that you originally downloaded as .mpd format, and opt a more powerful video downloader program that is capable of downloading and converting MPD to MP4 directly.