also there where probably even more linages straight from meada and not filtered through the Gracie's, but the Helio/Carlson and Fada/Franca are the only two major ones that have survived till today the rest were either co-opted by the kodokan, much like the OP video describes the kodokan trying to do to Helio, this wouldn't have been that odd for a small gym to accept kodokan rule changes and come into the fold as BJJ was much more similar to Judo in those days than it is now. Either that or the linage fell under the Gracie or Franca linages some where along the way.