The following videos go with this listing of Tones: Gregorian Psalm Tones
(Here is a Second version and Gregorian Psalms Tones adapted for English)
Below there is only one video per Mode. Find videos of all of the endings here.
Mode I
Mode II
Mode III
Mode IV
Mode V
Mode VI
Mode VII
Mode VIII
Mode Peregrinus
Video of All Modes (Not All Endings)