I can't understand the tutorial: what needs to be changed in the apk.

Find the panel at this fixed URL in the assets/setting.json folder. Use MT Manager. or APK editor.

Ok thanks done forgive me again there is still need to change other things because I can not understand and if I have to change also from the panel?

No problem, you just need to add your DNS in the panel and the panel URL in the APK. That's all. Then, try to log in to the app with your Xtream login.

Ok everything appropriate made with username and password makes me enter the application instead with mac address no I have to do something?

Dont understand these instructions, this is way more than add dns in panel and url in app,
No way it would be this long if it was just that
i uploaded panel changed url in app & add my dns in panel, its just crashing for me, try to load on the iptv screen then crashes
is there a /api at the end of the url or what exactly

here it go