diff --git a/app/assets/stylesheets/common/base/topic-post.scss b/app/assets/stylesheets/common/base/topic-post.scss
index a468756f0dc..021758c387e 100644
--- a/app/assets/stylesheets/common/base/topic-post.scss
+++ b/app/assets/stylesheets/common/base/topic-post.scss
@@ -1536,6 +1536,11 @@ span.mention {
   }
 }
 
+iframe {
+  max-width: 100%;
+  max-height: #{"min(1000px, 200vh)"};
+}
+
 .post-admin-menu {
   display: inline-flex;
   flex-direction: column;
diff --git a/app/assets/stylesheets/desktop/topic-post.scss b/app/assets/stylesheets/desktop/topic-post.scss
index d3a00db886e..fac39efdf38 100644
--- a/app/assets/stylesheets/desktop/topic-post.scss
+++ b/app/assets/stylesheets/desktop/topic-post.scss
@@ -373,10 +373,6 @@ button.expand-post {
   margin-left: var(--topic-body-width-padding);
 }
 
-iframe {
-  max-width: 100%;
-}
-
 video {
   max-height: 500px;
 }
diff --git a/app/assets/stylesheets/mobile/topic-post.scss b/app/assets/stylesheets/mobile/topic-post.scss
index 450774aaac5..80c1562d81d 100644
--- a/app/assets/stylesheets/mobile/topic-post.scss
+++ b/app/assets/stylesheets/mobile/topic-post.scss
@@ -276,10 +276,6 @@ span.post-count {
   z-index: z("tooltip");
 }
 
-iframe {
-  max-width: 100%;
-}
-
 .btn-group {
   margin-top: 25px;
   position: relative;