Some YouTube videos from Judson Brewer, director of research at the Center for Mindfulness at UMASS. The CfM has an online forum to support MBSR meditation.
A very brief (1 minute) intro to what they were doing with Real-Time fMRI Meditation Neurofeedback.
A couple of longer videos that get more into the nuts and bolts, The Center for Mindfulness’ Research Priorities (41 minutes) and Mindfulness and Neurofeedback (72 minutes), each including a bit of Buddhist theory and at least indirectly, some pointers to practice.
The Science of Compassion (17 minutes) covers some similar ground with a slight focus on loving-kindness meditation.
Dr. Judson Brewer: Life Worth Living and the Buddhist Tradition (32 minutes) is a one on one interview that delves into personal experience.