~25 minutes.  Well-edited.  Informative.

Both moons Enceladus (Saturn) and Europa (Jupiter) demonstrate evidence of huge oceans of liquid water protected by thick, icy crusts.  The Cassini probe passed through water plumes emanating high above Enceladus’ icy crust.  This water has been forced out of four long, deep cracks in the surface.

After analysis, the folks in the video above have discovered many chemicals within these Enceladus geysers (ammonia, carbon dioxide) but most importantly:  Possibly hydrogen they think might be coming from hydro-thermal vents on the rocky, ocean floor of Enceladus.