Hi,
You can use this code to set the width and height of the rendered video.
{% for item in post.link_video %}
{{ mb.wp_video_shortcode( {
src: item.src,
width: item.dimensions.width,
height: item.dimensions.height
}) }}
{% endfor %}
or fixed width and height
{% for item in post.link_video %}
{{ mb.wp_video_shortcode( {
src: item.src,
width: 300,
height: 200
}) }}
{% endfor %}
Read more on the documentation https://docs.metabox.io/fields/video/#template-usage