Set minimum height for captions of embedded youtube videos

Site URL: https://www.merlinsheldrake.com

I want to position a series of embedded youtube videos in a regular grid, two videos per row. When I do this the videos form an irregular grid because the captions are different lengths and cause the videos to offset. I overcame a similar problems with an image grid by using code in the custom CSS box that specifies a minimum height for the caption. I wonder if there is something similar that can be done for the video captions? 

Here is the code that sets the minimum height for the image captions: 

.image-card.sqs-dynamic-text-container {
    min-height: 220px;
}

Any help most welcome, thank you. 

Could you show the page where the youtube videos are?

Yes, it is: www.merlinsheldrake.com/press. I currently have worked around the problem by trimming all the captions to similar lengths.