Not sure if you are looking for general bo information or specific to Tang Soo Do.
Century has a series called "Nishiuchi's Traditional Okinawan Kobudo Weaponry" which is part of their panther collection. Each DVD is $10.
There are 2 for the bo:
Volume 6: Mastering the Bo Volume 1 Learn the most fundamental and important techniques needed to learn the bo. The original version of the first and most popular bo kata of all time, Shu-Shi-No-Kon is demostrated. Approx. 95 min. #KOBUDOD-006
Volume 7: Mastering the Bo Volume 2 Shows very practical bo appliations, including more advanced techniques and the three famous katas Cho-Un-No-Kon, Saku-Gawa-No-Kon, and Tsu-Ken-No-Kon in their original forms. Approx. 80 min. #KOBUDOD-007