Video upload: What is Enlightenment / Samadhi ?

Part 1:
Sri NV Raghuram explains;
1. What is Samadhi?
2. What to expect in realisation / samadhi state?
3. How do we know that the experience is real?
4. Should we use hallucinogens to get samadhi experience?



Sri NV Raghuram explains;
Can anyone succeed in siddhis, that are mentioned in Patanjali's Yoga Sutras?



Sri NV Raghuram explains;
1) Is it possible to reach siddhis, mentioned in Patanjali's Yoga Sutras?
2) Are siddhis signs of spiritual advancement?