For question 2, you have to convert all of them to either MPEG I (VCD) or MPEG II (DVD) format if you want to view them on a dvd player.
Use something like virtual dub or tmpgenc for avi (that includes divx, xvid, etc) and mpg files.
For mov you can use tmpgenc as well.
Use something like virtual dub or tmpgenc for avi (that includes divx, xvid, etc) and mpg files.
For mov you can use tmpgenc as well.