Your school, institution, responsibility, etc.
Video cassettes are up to two hours in standard play or up to seven hours in extra long play.
You get the most for your money with the extra long play video cassettes. Standard Play NTSC on Hi-8 also available. Occasionally I did not get the audio switched correctly. So I have to stay with the duplicating process all the time. An interesting way to practice in your learning process of Spanish and to retain to a greater degree that which was presented is to purchase your videos with both languages on them and listen with the Spanish volume set louder than the English.