They are not coffins. They are liners - you put coffins inside of them. I've seen this video and others like it, I have read the many conspiracy posts about 'plastic coffins' I have also read that instead of 'millions' there is only a few thousand. I also know that the harsh fact of the matter is that we are burying a lot more people today and we now understand that cemeteries leach their contents into the ground water. A few years ago local cemeteries dug up the newer graves (1940 onward) and enlarged the grave and installed plastic liners, then lowered casket back into the liner, gave rites and laid the remains to rest again. Some people complained about disturbing the rest, most were ok with it since it was to improve the quality of the local water which tested positive for things like formaldehyde. Newer graves already had a concrete liner, some where opened, inspected and re closed, others were opened, the contents removed, the old liner removed and plastic was installed. I have no idea what the 'rules' were on this, but it took several months to properly rebury everybody in our local cemetery. When you think about it, the population of the USA alone is now over 300 million. All of these people will die eventually, they will mostly be buried, in a cemetery and all of those rotting bodies poise a potential ecological disaster. As our population grows burial will have to be replaced with something else - most likely cremation. Not only do we see a clear danger in too many bodies, we are also losing valuable land resources to house the dead. Thus it is very possible the Government has these vaults/liners on hand with the goal of digging up the caskets already in the ground and placing them in a liner. Georgia is relatively low land with a high water table in many areas. Florida is even worse, it is possible that the government is 'quietly' and respectfully digging up, lining the grave, and reburying.