Hi @elenaortiz197679 

this is a customer to customer forum

i have no clue about Plex:

What I know, You need the channel multicastadresslist

https://db.iptv.blog/multicastadressliste

This list is only valid, if you have Magenta TV over the fix line produkt.

This list will not work for the OTT Version Magenta App.

At least: Play of recordings, will only work on unencrypted streams 😉

e.g. like the Public broadcasting channels ARD, ZDF etc.

Question:

Which Magenta TV product have you booked?

update: You mixed Magenta TV Stick and MR401

This are different streaming technologies: Unicast ( OTT / TV Stick) vs. Multicast (MR401)

Maybe this forum is more useful for you:

https://forums.plex.tv/latest