*additional info*
i found this quite strange, what ive done is:
put 1 y-adapter into the television, in the yellow slot.
into one side i plugged the yellow socket from the xbox lead, and the white/red lead from the double a/v cable... this works and let me record but in black n white no colour.... strangely enough the yellow cable on the double a/v cable doesnt work at all...
this would be fine in black and white to be honest but the problem is it makes my actual television a little blurry