Customize and Preview

The Good

• The preview does a nice job showing what you're going to get

• It's intuitive

• Export video quality is good

Suggestions

• When the aspect ratio of the background is not 16:9, it crops it. Letter box (with the background color) would probably be a better default.

• There should probably be some way to add a title, or a title slide image in addition to the background

• You really shouldn't advertise it as customizable when all you can customize is colors and background. It's ok to have an opinionated tool that doesn't offer a lot of customization, or still have the features in progress, but please don't call it fully customizable until you can at least set things like font face, outline color, lines per page (including ideally customizing page breaks), etc.

• You may actually be going too high with the quality settings on the video. It's fine for uploading to YouTube, but people will potentially recompress it to distribute it offline. 320kbps is overkill for AAC, 256 would be more than enough, and converting 44.1KHz audio to 48 is just wasting space. I think there's also room to optimize the video output, but I don't know as much about the specifics there.