Where to find mouse cable supporter as seen in this video?
I think the term you are best searching for is 'Mouse Bungee'. Searching for that on amazon brings back these results
http://www.amazon.co.uk/s/?ie=UTF8&keywords=mouse+bungee&tag=googhydr-21&index=aps&hvadid=4541355296&ref=pd_sl_npwnnz6up_e (UK amazon as I have no idea where you are from :D)
3M Command Cable Hooks work well