Just some musings:
I think that a certain amount of stress is useful and beneficial, especially when we are able to choose the situations that give rise to the elements of stress that are a part of our nature. It seems to me that the problems arise when there is conflict within us associated with the circumstances that we find we are in and our own nature, and especially when we cannot easily control events. This is often exacerbated by the feelings(real or not) that the demands made upon us by outside events are too excessive.
Sometimes, as the video suggests, if we can change our attitude to go some way in resolving that conflict, then the stress diminishes.
Sometimes, by taking away the circumstances, the stress diminishes.
And sometimes, by being in more control of events, the stress diminishes.