Hi I've used premier elements 10 plenty of times before but recently when I've imported my video files in and then added them to the timeline and clicked play theres no video playback just audio? The format of the files were AVCHD Video (.MTS) and i've also tried changing them to normal mp4. Why could this be ?
When you add the video to your timeline, is there a waveform (indicating audio) on the clip?
Have you recently had a microphone or headset plugged into your computer?
What operating system are you using?