[KingOfCoders]

For people in a video you need a model release from them. This is also a mistake many people make, they use Creative Commons licenses and think they are safe. A picture or a video needs model releases for the people in the picture (several exemptions apply).

[gman83]

If that is true then basically all the photographs in Wikipedia are illegal since the only check they do is for copyright not for model release. Pretty sure that's not a legal requirement.

[KingOfCoders]

https://en.wikipedia.org/wiki/Model_release

and

https://commons.wikimedia.org/wiki/Commons:Country_specific_...

See the other comment for some of the exceptions.

[danbruc]

Of which photos are you thinking? It most certainly varies from country to country but public figures or random people captured when taking a picture of a landscape or a building are at least in some countries not subject to such rules.