Fix link to High Performance configuration video (#720)
Fix link to High Performance configuration video (#720)

Has been deleted and re-uploaded again by the owner.
prometheus/docs,chosenken/docs,du2016/prometheus-docs,ddfreyne/prometheus-docs,ddfreyne/prometheus-docs,chosenken/docs,chosenken/docs,ddfreyne/prometheus-docs,du2016/prometheus-docs,prometheus/docs,ddfreyne/prometheus-docs,du2016/prometheus-docs,chosenken/docs,prometheus/docs