It went really wrong at the end eh I think the centre and stbd engine cut as he tried a go around leaving the port on full power. Not a good outcome was inevitable. As for govt regulations Here in the UK all model flying is subject to the air navigation order and controlled by the CAA, but administered by the British Model Flying Association. Up to 20 kg there are only requirements for observing airspace and altitude restrictions but above 20kg an individual exemption is required from the CAA to allow the aircraft to meet the ANO this include build inspections and flight competency. To perform at any public display a further exemption would be required. This would include requirements for insurance and further proof of competency
Link to large model association https://www.largemodelassociation.com/r ... kg-scheme/
It looks like from the video the aircraft is/ was being flown in Germany. the EU rulings are stricter than ours and come under EASA
Atb
Dale
And in the United States we have the Academy of Model Aeronautics which operates under the FAA and FCC (airworthiness/safety and radio spectrum control respectively) to establish procedures and liability minimum requirements for events. While in the US you're not specifically required to have a license (the courts recently ruled the "drone registration" to be illegal because there was a clause in the 2012 reorganization and modernization act that specifically prohibited such a rule - https://www.nbaa.org/ops/uas/faa-hobby- ... llegal.php ), most flying fields require you to be a member of the AMA to fly at their locations so that you will be covered under the club/field's insurance policy.
I think the centre and stbd engine cut as he tried a go around leaving the port on full power. Not a good outcome was inevitable. As for govt regulations 
Here in the UK all model flying is subject to the air navigation order and controlled by the CAA, but administered by the British Model Flying Association. Up to 20 kg there are only requirements for observing airspace and altitude restrictions but above 20kg an individual exemption is required from the CAA to allow the aircraft to meet the ANO this include build inspections and flight competency. To perform at any public display a further exemption would be required. This would include requirements for insurance and further proof of competency
