I do not have a tutorial and I am not on Youtube :) but I do have the service manual for this camera as well as an adjustment manual. The manual is really ideal for the teardown and replacement of the parts. It is NOT a user manual.I have posted them on a free file sharing site and here is the site
http://www.keepandshare.com/doc/2454097/dsc-t700-adj-pdf-december-19-2010-1-11-am-1-3-meg?da=y
http://www.keepandshare.com/doc/2454096/dsc-t700-level2-pdf-december-19-2010-1-11-am-2-9-meg?da=y