Someone further down this thread mentioned 'wish Wilson Savoy would..." regarding zydeco instructional video.
Check out the second link above--it's not Jeffrey Broussard or Horace Trahan, but it is a solid and respected triple row player on disc from Wilson.
I haven't sampled the video--so I can't vouch for the teaching methods, but the trailer for the video at the site looks like it has information shared in a helpful manner.