Remove Letterbox Bars?

I have some videos in unusual aspect ratios, very wide.

Fluentplayer adds letterboxing, black bars above and below the video to make it conform to a standard aspect ratio.

To show you what I mean. Here is a screenshot that shows the video playing as I would like it to
(embedded using Gumlet embed code)

And below that, the same video as it appears when in a fluent player (Ambient preset).

I would like to remove those black bars in FluentPlayer. Is that possible?