To play AVI movies on a standalone there are basically two ways.
The easiest is to buy a standalone able to play AVI movies. These can be found very easily and also at very low prices.
Alternatively, there are many dedicated tools that can convert AVI files into the video DVD format. These conversions, however, require a very heavy load for the CPU, so if you don’t have a powerful CPU it could be necessary to wait for many hours (even more than 24 if your machine is not powerful enough) to complete the conversion.
One of the most suggested tools by users that do such conversions is ConvertXtoDVD, but this is not a free tool.
DVDFlick is another excellent (and free, opensource) tool.