A 55-meter superyacht called "Lady D" caught fire in Phuket, Thailand in the early hours of August 7th. None of the crew onboard were injured and made it off the vessel. The vessel in question is a 1976 built ship which served in her previous life as an Offshore Supply Vessel. In 1989 she was converted to yacht status. This is what she looked like before the fire.
The fire is now fully out. She was towed just off another island to finish burn out away from other vessels and infrastructure.
I have been thinking the same too. I have a feeling it's due to a lot of the mega yachts aging and getting older. Perhaps a lack of training and maintenance. It's odd that the new yacht in the video has the same hull color as the megayacht on fire. Perhaps the same owner. The odd thing is the location of the fire, looks like it started in the upper deck and not the Engine Room or galley.