Creative Commons Attribution 3.0 (CC-BY 3.0)
This is similar to the Videvo Attribution License, but you are free to distribute the clip elsewhere in its original, unedited form. You must attribute the original author in all productions as well as any distribution channels in which the clip been made available for download. This license also allows for commercial use, although special attention should be paid to ensure that no identifiable persons, brands or private property appear in the clip(s) unless a model/property release has first been obtained.
For full information, read the CC 3.0 Guidelines here.