The inability to open and operate the M3U8 file does not necessarily mean that you do not have an appropriate software installed on your computer. Possible problems with the M3U8 format files Now just download and install the appropriate application. The first part of the task has already been done – the software supporting the M3U8 file can be found in the table. The first and most important reason (the most common) is the lack of a suitable software that supports M3U8 among those that are installed on your device.Ī very simple way to solve this problem is to find and download the appropriate application. If you cannot open the M3U8 file on your computer - there may be several reasons.