However, if you cannot find one to use for Tube8, it is also possible to create your own proxy site. This guide runs you through how to go about doing this: www.makeuseof.com/tag/how-to-get-into-blocked-websites-in-sc
Alternatively, this one helps you to create your own server in minutes: www.makeuseof.com/tag/create-online-proxy-server-minutes
Both websites run through how it is possible to set up a proxy server on a public network. This is quite a complicated procedure so it is only recommended to be carried out by advanced computer user, as a novice would struggle to complete all the steps and would be more likely to be found out.
If you are caught using a proxy server at work it is likely you will face disciplinary action and could be sacked for breaching staff rules. The same goes for at a school as there is a reason the site is blocked in the first place - so be careful doing this procedure.