In this clip from the 2003 Boulder seminar, Tissier does the irimi nage with a sweep at the 1:30 mark and then again at the 1:50 mark. His sweep is relatively high and goes for both legs. From what I recall of the Yamaguchi version of the same waza, the sweep was lower, more subtle, and went for only one foot. Tissier's first art was judo after all and he should be comfortable with sweeps.
http://www.youtube.com/watch?v=ax-_d...elated&search=