Help with download a .mp4

Hi, i want download a mp4 from a url like this:{{i}}.mp4

I tried with:

      url: "{{i}}.mp4"
        from: 925
        to: 999
    download: /data

but not work, usually i download with a basic wget cron but i am using flexget for other so I want update also for this kind of contents.

I hope you can help me,