Is the trial a full functions or are there limitations or watermarks on the final product?

I have the files on my computer and the DVDs. But I want to know a good burning program. The last time I tried burning DVDs I couldn't find a good program, only ones that had watermarks, etc. Can I burn DVDs on iTunes? If I can tell me how to. Thanks.

I want a converter program to convert video to gif easily. Windows movie maker helps me get video clips, but I need a good gif converter without watermark inserted. Help? I have tried a lot, either give low quality or come with watermarks.