How do I make a video recorded sideways upright again?

im trying to make a video of me playing the lead guitar part over my already recorded background part. how can i get the background audio to go directly into the video rather than just film it coming from a the computer speakers??

I recorded a video for youtube on my itouch but its like this small screen of video between 2 black bars how do I make it full screen?

I want to do this because I recorded a video of my friend she made a funny noise and i want to use that as my ringtone

well i recorded a video off me singing but its very low how can i make it louder?

Our wedding video is chapter in this long video file and I do not know how to edit it. Is there an editor that can view/recognize an IFO file? Thanks in advance!

I recently borrowed a VTR tape (V8) recorded using a Sony Handycam (unknown/different model). When I tried to play the video, using my Sony handycam (DCR-TRV250), the camera could not read/recognize the contents of the V8 tape. Is there a compatibility...

I work out alot and have recorded bits and pieces that i need to mix together all into one video to send to a company for a body builders sponsor. Does anyone know of any free programs i can download to my computer to do this?

I have made a great video On Hyper Cam But the Problem is That I wanna cut just a piece (or a photo).The video its to short almost 8 seconds.Is it Possible to Cut just a photo (if it is) How?? Please Help!