The video is free to use, but you must cite this paper:
’t Hart, B.M. & Einhäuser, W. (2012). *Mind the step: complementary effects of an implicit task on eye and head movements in real-life gaze allocation.* Exp Brain Res, 223: 233.
https://doi.org/10.1007/s00221-012-3254-x
There are several different formats with the same video. For use in PowerPoint the H264 version might be best.
The video shows gaze direction (head and eye movements) in two conditions in the real-world task of walking. The two videos on the left show videos recorded from the first-person perspective of a person walking on a cobble-stone road and the two videos on the right were recorded when walking on the adjacent, irregular steps. The two bottom videos show the image recorded from a head-fixed, wide-angle camera, illustrating head movements, while the two images on the top show images recorded with eye-centred cameras, capturing direction of gaze. This demonstrates how much influence a simple task has on visual attention.