Complex sentence: The video footage was sent by Stewart shocked colleagues to ABC and it and the other networks all ran the footage in their evening news, over the next few days the footage was repeated continuously on channels around the United States and the world.
Split into simpler sentences: The video footage shocked colleagues at ABC, and it and the other US networks ran the footage in their evening news broadcasts. Over the next few days the footage was broadcast repeatedly in the United States and around the world.