Currently if you're searching for videos and for example you get a lot of shorts, it'll squoosh the thumbnail to fit the 16:9 aspect ratio. But I wish there was a setting to not allow resizing, so it'll show the proper portrait thumbnail of the video instead
Workaround: this seems to work for some videos but a lot of videos seem to actually return a cropped thumbnail already and this css trick doesn't work:
.videoResultItem .videoResultThumbnail img {
width: auto !important;
height: 100%;
display: block;
margin: 0 auto;
}