Yes, crossplay is planned for Path of Exile 2. However, it will not be available at launch. The developers are still discussing the details of how it will work.
Here is a more detailed answer to your question based on the provided information:
The interviewer asks about crossplay at 32:32.
Jonathan Rogers, the game director, says that they will be talking about it "a little bit later" at 32:34.
He does not provide any details about the implementation of crossplay at that point in the interview.