Capturing a keynote speaker's full talk on video is important for preserving the complete content and message of their presentation for those who were unable to attend or for future reference. It also provides a valuable resource for those who want to revisit the speaker's ideas and insights at a later time.

Being able to capture the full talk on video demonstrates the level of professionalism and attention to detail put into the event, and can help to establish the event as a comprehensive source of information and inspiration.