Storyline block in Rise is low quality.

Why does my Interactive Storyline block appear low quality in Rise? The video embedded in the Storyline file is 1080p HD, but it doesn’t seem to retain that quality once it's uploaded to the Storyline block in Rise.

On smaller screens, this isn’t noticeable, but on larger displays, the drop in quality is quite apparent.

I’ve already tried disabling adaptive quality and setting it to the highest possible, but that hasn’t resolved the issue.