BF existed only for the money. As soon as the videos and partner sites and advertising did not bring in enough money (which was easy with the spread of torrent), it was closed after a short time.
The death of this forum will be that it has no owner. It has not been updated, not fixed, no communication between the owners/administrators for years. It runs without any safe and redundancy, stopping with regular errors. One day it will stop completely and it will be over.
Then someone will do the next one...
It is likely that the media files are located on a separate server. Talking about animal sex is not prohibited in all states, since freedom of speech is basically strong in the USA. You can store the media files in another country, since it is already illegal in many places. This is also proven by the fact that the forum is fast, while downloading videos is horribly slow.