Video Player bitrate and the network bandwidth

Hello, I read on the forum that the Roku Video Player will adjust the bitrate of the file it is playing depending on network bandwidth conditions but does it do the same if the video is HLS and read from an XML file?
Example;
hls
full-adaptation

HD
0
http://server.com/video.m3u8

Should I assume that no-one knows the answer and delete my post?

If you point your app to the m3u8 file it will download the file. HLS streams can have a single stream or multiple streams inside, so yes, if it has multiple streams the bitrate is part of the HLS specification.
https://bitmovin.com/mpeg-dash-hls-exam … e-streams/