When i watch video on my iPhone 3g, it plays videos but for 3 secs and then goes back to the page where the video is. why that happens? I can't watch the entire video!! What should I do?

Cant seem to drag or see mp4 files

i bought an original movie dvd and i try to copy in my computer
but it always displays error what i do ?

I have a iPhone and can't download the songs straight to my phone.

My iTunes Library file becomes damaged very frequently, re-install can't solve the problem. Any suggestions?

My DVD Player is playing, but there is no sound.

All the video players on my computer suddenly couldn't open any avi video files. I don't know when does it happens. I've tried Windows Media Player, Quick Time, VLC Media Player and DivX. I installed K-Lite_Codec_Pack_660_Full instead of teh ffdshow. But these didn't change anything. I also tried the Shark007 5.8.6 codec pack but it still didn't work. My computer runs Windows XP Pros 2002 SP3. Please help me, thank you!

I am going to make a music video about an element on the periodic table on a video camera but don't know how to make it come together. we need a video editing program to cut and create a music video.No seperate audio.

Why is the estimated file size is over four times the source?  Source MP4 is 730 MB, but the estimated once imported is close to 4 GB.

This time I want to send something special, meaningful gift, as memories too! Do you have any suggestions?