First, you will need to go to
this page, after that there are 3 methods to upload your list.
Method 1
Copy the URL that your provider gave you and paste it into the Xtream URL input and click save.
The URL should be in this format: http://provider.com:8000/player_api.php?username=username&password=password
Method 2
Upload the m3u file that you got. Click on Choose File, then find a list that you want to upload, after that click save.
If your m3u list is from a provider that uses xtream, you will be asked whether you want to use content from xtream or from m3u.
Xtream has more options than m3u, but m3u lets you keep the order of content as is (you can change the order of channels).
Method 3
Paste URL that leads to m3u file in the Xtream URL input and click save.
URL example: http://example.com/mylist.m3u