I will talk about how companies like Buzzfeed and Vox get videos they can use, I will be going over how to get Paid Access, Licensing Content(videos) from other publishers, Ask for permission to use someone's videos, getting Free stock videos/footage.
Big media companies like Vox and Buzzfeed, have paid access to stock video and images which you can too, they also sometimes offer free videos for you to use as long as you sign up with them, here are few sites below that can be used as a good resource.
They also license videos from other new media outlets and publishers, like
Thomas Reuters you can access their Raw Footage, Archive Videos. Sign up for a
And if they find content that they like, they directly ask for permission if they can use the content on their videos.(by emailing them or reaching out to them) sometimes they offer monetary amount and give credit to the person who captured/owns the videos. You can do the same thing,
You see content on Youtube on Instagram. You can directly message them.
You can also acquire free videos from site like.