StbEmu
https://docs.stbemu.com
Keep in mind that this app is set up for a demo IPTV portal for testing purposes. If you want to use the app, you need to configure the app for your IPTV provider.
The app does not support m3u (or other) playlists.
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NOTE: This app is designed for use by experienced users. In order to work properly, it must first be configured and if you have never configured IPTV boxes, it may be difficult for you to configure it. Keep in mind that this app has a lot of settings that need to be configured before it can be used by a user (read the wiki first). If you do something wrong, you risk making the app unable to work.