Adding a Node Caption on a Timeline Component in Flow

Steps to Edit the Node in a Timeline component in Flow.

Hi, I was wondering if there was a way to customize the Timeline within Flow. I am trying to add a border colour to the boxes. If there isn't a feature already existing for that. Is it possible to add my own custom CSS to modify its appearance?
 

Steps to Edit the Timeline Component in Flow.

Use Timelines to create a graphical representation of information that is displayed sequentially along a vertical line. This lesson covers editing of the Timeline Component Content.

Note: Timelines are only available in Flow.

Speed up development time by using Baseline Projects as your own template library for Sections or Layers

Steps to add a Timeline Component to a Page in Flow.

Timeline component is one of many components available on the Engage Tab in Flow.

You can have Elements on any Page targeting multiple learning audiences or contexts

I was wondering if it was possible to add a video file into a Timeline panel. I noticed that there was only the option for embedded videos. Is that the only option?
 

File Format Types

Easily move and re-order Sections, Rows, Groups and Elements within their respective container

Speed up development time by using Baseline Projects as your own template library