1. Please give a better description than 'help me please' in the subject line. If you say 'No sound in iPod video, why?' then the people who know the solution can help you. As it is, your question has a good chance of being ignored.
2. It looks like you're trying to play 'muxed' videos, where the sound and the movie track are flattened. What format are your original movie files?
3. Do a search before posting. This question comes up frequently and has been answered a couple of times.