While ISIS has generally been classified by outside observers as belonging to the tradition of “Salafī-Jihādism,” a term first coined in 2002, some, mainly Sunni (and often Salafī) Muslims themselves, have disputed such a label, and have instead advocated for the classification of ISIS as a...
ISIS leader Abu Bakr al-Baghdadi may have appeared for the first time in five years - CNN
There have been some doubts about the authenticity of the video, but it's very clearly him not just from the appearance but also the voice if you know Arabic. I have not been able to find the full video...