This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionSonoluminescence of Synthetic Ordnance Gel.ogv
English: This video shows a Federal .22 Hollow Point shot into Clear Ballistics oil-based gel. The wound cavity pockets collaspe creating bursts of light or sonoluminescence.
The video was captured with a Phantom v12.1 high-speed camera by Nathan Boor of Aimed Research on June 3, 2013. Identification credit due to an anonymous comment on TheFirearmBlog.com article Aimed Research - Extreme High Speed Video (June 3, 2013 by Richard Johnson)
Free file sharing must have accompanied credit to author, Nathan Boor of Aimed Research, on the internet page it appears.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.