Audio and Video Stream URL in m3u8

Hi, we have the problem, that we receive our Stream by a Brightsign Player at other locations. Since some time the audio and video stream is separated. With the URL we used in the passed we have the problem, that the first stream will be used. This is the audio stream.

To solve this problem I have to create a workaround with audio and videostream. But
I need not the livestream URLs because these can be changed with next stream. How can I find the right audiostream URL .