The video has some. Maybe most best known is the CNT which was a network of free association. A modern example would be Rojava which is not democratic centralism but democratic confederation and therefor decentralized. Of cause, all these are suppressed by all states and therefore it is difficult to implement. Arguably, quite a lot of (but by far not all) organizations before modernity were hieracy free and some still are. the famous anthropologist and anarchist David Graeber once said that anthropologists have a affinity to anarchism because they know it works. He himself did research in Madagascar where, according to him, the state does very little in the rural areas. You should read his work or watch this interview from arround 2005.
The video has some. Maybe most best known is the CNT which was a network of free association. A modern example would be Rojava which is not democratic centralism but democratic confederation and therefor decentralized. Of cause, all these are suppressed by all states and therefore it is difficult to implement. Arguably, quite a lot of (but by far not all) organizations before modernity were hieracy free and some still are. the famous anthropologist and anarchist David Graeber once said that anthropologists have a affinity to anarchism because they know it works. He himself did research in Madagascar where, according to him, the state does very little in the rural areas. You should read his work or watch this interview from arround 2005.