We love seeing lots of media on LearnDash pages. Unfortunately, it’s often difficult to get a great media experience on both desktops and phones; sometimes thumbnails cause odd text wrapping issues that are difficult to correct without assistance. For that reason, we like to encourage full-width images that are reasonably short. These work well across platforms. One is included above.
That type of aspect ratio for an image works well in LearnDash; it adds value both on desktop and mobile while still making the text above and below it visible.