diff --git a/packages/block-library/src/cover/style.scss b/packages/block-library/src/cover/style.scss
index 619cad46c1b5a3..0338e0ce904fad 100644
--- a/packages/block-library/src/cover/style.scss
+++ b/packages/block-library/src/cover/style.scss
@@ -1,7 +1,6 @@
 .wp-block-cover-image,
 .wp-block-cover {
 	position: relative;
-	background-size: cover;
 	background-position: center center;
 	min-height: 430px;
 	display: flex;
@@ -200,6 +199,8 @@
 video.wp-block-cover__video-background {
 	&.has-parallax {
 		background-attachment: fixed;
+		background-size: cover;
+		background-repeat: no-repeat;
 
 		// Mobile Safari does not support fixed background attachment properly.
 		// See also https://stackoverflow.com/questions/24154666/background-size-cover-not-working-on-ios