Vimeo: Brute force on "vimeo" cookie

I took at "vimeo" cookie "Vimeo authentication token" https://vimeo.com/cookielist And to show approximately my thought process I did : 1. compare two generate values from two different sessions of mine epk9rrdskc70pcdxxmrdmdx7jpcdxxmrdmdx7%2Cpv222v2mfw90w5dcv5wtkmsfffxfsxc2tdruxmcrt...