Saving a title leaves it in the online service
The publisher’s mobile FAQ says the Binge app does not provide a download feature and requires an internet connection to view programmes. It offers Watchlist as a way to keep favourites together for later. The documented star control adds a programme from its information page or player, and the Watchlist can be reached through the app’s navigation. That saved entry is a pointer to the online programme, not a completed offline copy.
The mobile casting control is separately unavailable
The same FAQ says Cast and AirPlay are not currently available in Binge Mobile. This is compatible with the service also advertising television viewing: the marketing page names Android TV, LG Smart TV, Fire TV Stick and Binge+ set-top-box routes. A native television application or a box running Binge is a different route from transmitting a phone player through its Cast button.
Plan the actual screen and connection
Suppose a programme is in the phone’s Watchlist before travelling. Its presence does not establish that it will play without connectivity or that the phone can send it to any hotel television. Check the supported viewing route and the relevant package first. The Binge terms also qualify certain partners by screen and require separate activation steps for named services. Keep the programme, selected partner and account offer together when checking availability. A saved list and a broad all-devices promotion do not remove those specific conditions.