How to match height of Video and Gallery Blog Post Featured Content

Hello on our site wearecovalent.com/thoughts we tend to use two post types a lot, the "Gallery" and the "Video". The gallery pulls from a wordpress gallery inserted in the post itself. The video pulls the embed code from vimeo in a post options panel.

On the main thoughts page, where content is featured, the video post and blog post have different heights and we want them to have uniform heights. We dont care which one's height we match, but Im wondering, is this a CSS code? Something in the gallery settings or the video embed code? Please advise on how best to proceed. Thanks!