By "meditation" is meant the conscious process of acquiring information about reality.
If by "dream yoga" you mean being awake in the astral plane and consciously investigating your defects, then yes. Most people, however, even when awakening in the astral plane, fall into fascination with illusions, and become diverted into investigating nonsense like seeking some "glorious" past life, or nosing into the private lives of others, etc.
The best meditation practice on the nature of reality:
https://youtu.be/gZ4DIRPSuB0