I have that very DVD in my collection from years ago, I really must watch it, that and 'Casts that Catch Fish'
The methods such as 'across' and the 'elevator' are what I always do when prospecting where there are no obvious rising fish, wee soft hackle spiders such as Stewarts black and gold, or Snipe and Purple, Waterhen Bloa, in faster water I put a PTN on the point to keep things down if needed.
Your right Mike, walking downstream is much more relaxing than battling upstream, especially if prospecting.....(different story if targeting fish though)
Cannot wait until spring!