Nowadays many sites start using the MPD manifest instead of well known M3U8 and F4M.
Dynamic Adaptive Streaming over HTTP (DASH), also known as MPEG-DASH, is an adaptive bitrate streaming technique that enables high quality streaming of media content over the Internet delivered from conventional HTTP web servers.
The multimedia file is partitioned into one or more segments and delivered to a client using HTTP. For the client, aka video player, to know each segment position, a media presentation description (MPD) file describes segment information: timing, URL, media characteristics like video resolution and bit rates.