Why dont you try the following:
1. Use a good encoder and convert the file to a format that can be put on a DVD.
2. Use a good DVD Authoring tool to create the DVD file image.
3. Use Nero to burn.
If you got what I just said that is half the job, but if you didn't then what Fritz93 said is very valid and you should try it, i.e. reading the guides. Though we could explain everything in detail to everyone regarding everything, each and everytime, the "EXCELLENT TUTORIALS" written by ChickenMan and several other people over the years on each and every topic, for the benefit of people New to the topic, would "COMPLETELY LOSE MEANING" and become redundant and all of us would be wasting time and effort explaining the same thing again and again. You should not take offense at what I have said as this pretty much goes for everyone, including me when I began. So spend some time, effort and you will be definitely rewarded. No gain without Pain.
Hope this helps.
PS: Fritz93 knows his thing. So when he or anyone else wants to help, they really do mean it. I learnt everything on these pages myself over a lot of sleep deprived nights.