Describe what succeeds
Write down whether the provider saves, channel names appear, a channel opens and audio starts. Those results establish separate completed stages. If no list loads at all, a display workaround is not yet the most relevant investigation. If only one item has black video, compare another before treating the whole desktop session as faulty.
Test a local file through another installed player when you have one available. Keep the file and output ordinary. A working comparison narrows the question but does not prove that two applications load the same libmpv build or graphics integration.
Record the Linux environment
Include the distribution release, Hypnotix package version and whether the login session is Wayland or X11. Do not identify the session merely from the desktop theme. If uncertain, use your distribution’s supported system-information route or ask its support channel how to confirm it.
Also note how the application was installed. A repository package, a locally built copy and an old third-party package can have different dependencies. Reinstalling a different source during diagnosis can conceal which environment originally produced the fault.
Use the upstream workaround within its scope
The Hypnotix README documents a Wayland workaround using its mpv options and an X11 application backend. Review the current upstream instructions for the installed version before applying it. Preserve previous options and make the change only to the relevant application rather than changing the whole system indiscriminately.
Repeat the same channel and observation after the change. If the video surface returns, record that result and the exact application environment. It is evidence about that rendering path, not proof that every Wayland system needs the workaround or that an IPTV service was at fault.
Keep the next support report small
If the problem remains, provide the completed stages, session type, package source and comparison result. Remove source URLs and device/account identifiers. An error log can contain credentials, so inspect any excerpt before posting it.
Do not keep adding graphics options from unrelated tutorials. A short, reversible configuration and a reproducible failure are more useful to a maintainer. If the whole application crashes rather than presenting a black video area, identify that as a separate behaviour.