This video demonstrates the traditional method of creating flax fibers for weaving linen cloth in Ireland, starting with the cultivation and harvesting of flax plants, rhetting and drying it, and the various methods of breaking down the fibers to make it useful for weaving cloth.

From the video page:

How to make linen from flax.  A step by step demonstration of how linen is made using traditional Scotch Irish cottage industry methods.  Flax and linen farming was one of County Donegal’s biggest home industries for centuries.  Here we show you how a typical household would have produced linen by hand.  The Ulster Scots were instrumental in transforming flax and linen into a major commercial industry.

East Donegal (the most northern county of Ireland) was the biggest producer of flax/linen in all of Ireland.  Colm Clarke worked in the industry from the age of 12, helping his family to earn a living.  He is one of the few people still alive who remembers the whole process of sowing, harvesting and processing flax to linen by hand.