On Perfect player, I use the following URL for OK2. The m3u_plus option on the Playlist URL is mandatory. If you just use the m3u option, it will not load the tvg id tags, and will not be able to pair up the EPG with the actual channel list.
Code:
Playlist URL – Replace the xxx with your account username and password
http://ok2.se:8000/get.php?username=xxx&password=xxx&type=m3u_plus&output=ts
EPG URL – Replace the xxx with your account username and password
http://ok2.se:8000/xmltv.php?username=xxx&password=xxx
However, having said that, lately I've been having an issue with the OK2 apk itself, and very often I need to try to refresh 4 or 5 times for it to update anything. I often get "nothing updated" in the evenings. during the day it is not an option. However Perfect Player works fine (admittedly, a lot longer to load up).
Anyhow, my buzz xpl 3000 has finally been ordered, so soon I will hopefully no longer have these issues