I've bought and watched the previous paid screencast (http://www.watchmecode.net/refactoring-javascript) and it's not worth half the price of a good book. The level of preparation and detail that goes into these productions don't justify the price atm. Not bad, but at this price you should get something inspirational.
$ uglifyjs
function tm(I,t,e,s,i,c,k) {i=0;while(s!=e){c=t[i];k=(c)?I[s][c]:I[s].B;if(!k)return false;t.splice(i,1,k.w);i+=k.m;s=k.n;}return t;}
function tm(a,b,c,d,e,f,g){e=0;while(d!=c){f=b[e],g=f?a[d][f]:a[d].B;if(!g)return!1;b.splice(e,1,g.w),e+=g.m,d=g.n}return b}