interesting question. it happened maybe a few times in my early days when i was trying to develop my vidiot style.
when i first started out with videos, i always followed a rotation - usually the one provided by the brand.
then i migrated to writing a rotation on a spreadsheet with video titles from many different groups.
and fast forward to today, mentally i just alternate between cardio and strength and fit in some yoga in the evening. it's second nature.
that said, i keep a handful of DVDs nearby - and the past several months, I've been focusing on virgins, so again, i just alternate between cardio and weights. if it's dreadful, i just let the DVD play and i either follow the video or do my own thing. this recently happened with a Get Healthy U DVD - some of it was Joni-O worthy, but i just did my own thing, then joined in when i saw something good.