These clips are less then full screen – even for SD.
When you convert them as dave mentioned. I would leave the size UNchanged to avoid further image degradation.
They will be letterbox and pillar box in a NTSC sequence.
You can double up the video layer and blow up the back ground, blur, lower opacity to fill the screen if you want. Or you could use a jump back grfx.
Chris Tompkins
Video Atlanta LLC