This would get slightly tricky. Here's one thing you can try - within the tabbed content create a <div> which will house both the video and the text you want to the right of the video. I don't know how your video is set up (embedded from YouTube, uploaded directly into Canvas, Studio, etc.), but you can try to float that to the left with a little padding. That way the text will fill the right and bottom of the tab. Roughly, it may look something like:
<div id="tab-1">
<div>
<iframe style="float: left; padding-right: 20px;" src="URL"></iframe>
<p>Tab 1 content. This would be your video reflection text.</p>
</div>
</div>
Alternately, you could experiment with bootstrap within the tab. I haven't actually attempted that, but maybe I'll give it a try in the coming days and explore. If you haven't tinkered with bootstrap, here is a good explanation:
https://www.howtocanvas.com/create-amazing-pages-in-canvas/bootstrap
⚠ ⚠ disclaimer ⚠ ⚠
The tab feature in Canvas relies on old, antiquated code that Instructure/Canvas no longer actively supports. The developers have not actively removed the functionality (called jQuery, I believe), but they strongly advise against using it. Tabs do not consistently work in mobile browsers and don't render on the mobile apps. Right now tabs mostly work on laptop and desktop browsers, but it may not be a sustainable feature.
