Youtube Reel Vertical Video Support
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Hi there, @lismedia_group 
If I got you right, you mean YouTube Shorts. In this case, that Shorts are supported in our YouTube Gallery app.
If you’d like to display only shorts in your app, this article explains how you can do this - YouTube Gallery: How to display only shorts in your widget?
To apply the vertical format, feel free to use this solution - Vertical video display (like Shorts)
Try it out and let me know if it worked 
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