There are programs that will convert video for your tivo. If you have a newer tivo you should be able to pull video right from your computer to your tivo if you have it networked in your house. We do it all the time.
@lala1: Hi. To easily upload your CatheDownload videos to view on TiVo, you will need either of these pieces of software (depending on operating system):
If you are using a Mac, Toast 10 comes with excellent instructions on how to transfer your videos to TiVo. If you are on a PC, TiVo's website provides the following instructions:
The CatheDownload videos should play without conversion on TiVo according to the file specifications, but I have not personally attempted it to verify this. Please let us know how you make out!