I am working in a short film to later submit to festivals and have public screening, and need a green screen footage of a snake. I found a site (see below and also youtube) which mentions that the watermarked footage is free to download. Can I use these video and key out the footage. Is that fair use?
http://footage.framepool.com/en/shot/477510446-egyptian-cobra-threatening-lambent-attacking
http://footage.framepool.com/en/shot/477510446-egyptian-cobra-threatening-lambent-attacking