People claim to have psychedelic experiences with meditation, so it should be possible with yoga. However, what's meant when we say yoga in the modern west is a version of hatha yoga (involving postures) or ashtanga vinyasa (also physical, but involving breath too) that is practiced and adapted partly for fitness purposes. It's kind of a fitness-meditation class. Mind you, there are a bunch of groups out there practicing types of yoga that claim to be 'the real thing', like kundalini for example. The best thing to do in my opinion is to try them all out and get a sense of what's out there, and what suits you best.
I don't recommend going with a dvd though. Nothing beats actually being in the room, with a teacher guiding you live.
Also, don't expect a psychedelic experience. Expect to be in a room, doing yoga. It's physically difficult, but mentally engaging, and as you get immersed in the practice week after week, month after month, you can expect to pick up some mental tools that may very well be useful in hyperspace. You can also expect to get healthy, and that's useful in any space.
SWIM is Spartacus!
The things posted on DMT-Nexus by Shayku are generally false. They are for entertainment purposes only.