That is not clear to me - as a desription - sorry.
You import your files - then manually set the sequence - or let the sequence decide ? (I always let it choose)
When you export your video you shouldn't export an mjpeg file - but the codec that is best for further needs ...
For YouTube this will be H.264 for example ...
Rendering can't corrupt the files I think ...something has gone wrong before ... but I don't know how far you
have learned Premiere ... so there are many open questions ...
Last edited by TomGarn; 08-27-2014 at 08:06 AM.