Can you burn both AVI and WMV on one dvd disc?

You can. I recommend a rewritable disk, you can format it to accept data files, which makes it much like a usb. There are 700mb disks and 4.5g disks, you want to look for the 4.5g which can hold a season of programming in most cases. Later when your tired of watching them, you can simply record over them and put in something new.