Tenzin Wangyal Rinpoche explains the 19th nail of «The 21 Nails», a set of core teachings from Dzogchen that help one directly separate doubts about our natural state of mind, and guides a Meditation practice. Nail 19 has to do with the Bardo, the process of dying. Broadcast live from the 2014 Summer Retreat at the Serenity Ridge Retreat Center in Nelson County, Virginia.
This video also contains subtitles in English
There is also the Meditation from the video: