This valuable resource from the University of British Columbia's Linguistics Dept. provides a very viewer-friendly overview of the IPA.  It includes  three introductory videos on articulatory phonetics; an explanation of the IPA;  an introduction to the sounds of the world's languages; as well as a "Pronunciation Station".  The use of ultrasound technology allows you to view what is happening with throat, lips, tongue etc. while specific phonemes are being produced by native speakers of various target languages.