directives -> 
	language-version <1.1>,
	namespace <ytwatch>;


mathematics <z2ew5K7t> ->

	Primer [https://www.youtube.com/channel/UCKzJFdi57J53Vr_BkTfN3uQ] <zCOKdAjS>,
	Mathologer [https://www.youtube.com/channel/UC1_uAIS3r8Vu6JjXWvastJg] <JtX3Rer7>;