Here is a Plex channel plugin for Telemundo. It is available from Github at https://github.com/shopgirl284/Telemundo.bundle
This plugin uses the NBC/Universal website code that is used by their Ipad app and it can only access videos that do not require TV provider info. Since this channel pulls content that is displayed in their Ipad app, the videos and shows that are available may be different than those available through the Telemundo websites. I also cannot speak to what shows or videos they may choose to offer on their Ipad app or why or which ones they choose to lock and require TV provider info.
I created this plugin using the Plex NBC channel plugin, so it has the same requirements and restrictions as the NBC plugin does. If the Plex NBC channel does not work on your Plex player, then this channel will not work either.
Client Restrictions
The videos for this channel are eHLS format, so they will only direct play on Roku, Android, PlexWeb using Safari, and iOS. So this channel blocks access for all Plex player apps that cannot play eHLS videos direclty. All others Plex players would have to be programmed to send all HLS videos to Plex Media Server to be transcoded in order for the videos from this channel to play properly on that Plex player. If and when any additional Plex player apps are updated to support the transcoding of eHLS videos, I will be happy to update the channel to include that Plex player app in the accepted list of clients.