PJM Videos PJM offers various media to assist in the understanding of our business and industry. PJM’s YouTube channel and videos site feature short videos about how the grid works, PJM’s system, what happens on the grid on a hot summer day and energy storage solutions such as plug in hybrid electric vehicles and lithium ion batteries. The Discovery Channel also provides a video on how PJM manages the nation’s electric grid. Watch the full episode. See more NOVA scienceNOW.