At BA LHR we use the clip from U-tube to indicate to ground / ramp staff the issues involved with engine starts and runniing down on stand. That said I still see these people ignoring the rules when they are out on the patch. It is always the same complacency creeps in and often the hearing protectors take away the noise so the threat seems much less.
When in other locations I am alarmed by the complete lack of training given to many of the staff in particular GHA's. It seems we will never learn and the industry should/must take a lesson from the UK construction industry that in 10 years has gone from almost a death daily to only a few per annum.