Well I'm only 12 years late in watching these videos (thanks for still hosting them on YouTube, @natterjack).
Unfortunately the techniques (especially the "be brave and singe fry the spices until almost burnt") didn't add anything beyond the typical curry cooking methods for me. Might just be a personal thing or a matter of preference, of course, but it didn't produce an extraordinary taste or smell for me.
Then again I mostly cook Scottish curries which often don't even use any mixed powder at all, so again it could just be a regional/personal thing.
Still great to see videos from a working restaurant though, so I'm glad to have given it a try.