I watched the video here: https://www.youtube.com/watch?v=TupF2TpHHFA. but the section for media is missing. The video appears to be outdated. How do I make all media images the same height? Thanks. The page is here: https://www.thetonefactory.com/videos/
Welcome to PickPlugins.
The video you've shared is from the old version of the post grid. In the latest version, you've to go to Edit mode of the layout you're using.
And there, you can find different elements with advanced options settings.