У вашего броузера проблема в совместимости с HTML5
A quick demo of our Fitted mesh support. This video shows how to convert an existing attachment from classic bone weighting to fitted mesh weighting. In the last few minutes i also show you how you can create a fitted Mesh from an unweighted model. Please use Avastar-1.1-1023 or newer from the testversions folder of your Avastar download page.