Odeon VOD accepts M3U lists and XC credentials, meaning playback depends on external sources chosen by you.
It is compatible with Android phones, TV Box devices, Android TV, and similar devices — offering the possibility to watch on a large screen.
The app is lightweight and the installation file takes up relatively little space (~ 30 MB).
Odeon VOD is just a player — it does not “offer” predefined movies, series, or channels.
The legality of the content you watch entirely depends on the source of the list/stream provided by you: if the source is unauthorized.