The normal way

Using the normal styling responsive

video, img {
  max-width: 100%;
  height: auto;
}

The simpliest way to make a image responsive

Aspect Ratio:

img {
  max-width: 100%;
  aspect-ratio: 16 / 9;
}

The hardest way

img {
  max-width: 100%;
  height: auto;
  aspect-ration: 16 / 9; 
  object-fit: cover;
}