Hi gbenga.animator,
I would suggest the Motion system for this. Note that the joint rigs need to be identical. E.g., some rigs have a different setup or hierarchy, which will not work. Or perhaps show some shortcomings.
I like to have as a parent on each joint hierarchy a root object (a null). This is not always stressed by instructors. The Motion Tag should sit on that null.
Having said that, here is a series that might help:
https://www.cineversity.com/vidplaylist/mixamo_to_cinema_4d_character_workflow/mixamo_to_cinema_4d_character_workflow_series_introduction
Create a copy of your rig, animate this as you like, and then create a motion clip. This clip can then be used like a video clip in a film editor.
All the best