I think WT uses the word "channel" in reference to supernatural messages from Jehovah
Wrong: channeling is wrong according to JW and is only divination or such from demonic sources.
Channeling is not used in connection with "good messages". That is just described as "utterances from God/Jehovah" or some such wording and is approved without any particular terminology.
Pretty much the official line is that such communications have ceased since the NT/Greek Scriptures times; modern communication is simply the "acting of the holy spirit" and they let it go with that pronouncement. No specific instances will be admitted, produced or discussed. Vagueness is the opeative term here.
For instance, if you were to discuss Joan d' Arc, they would say that it is demonic in nature, perhaps channeling and was not a communiqué to JW's.
Mustang