Customizing Player Size
Visit the YouTube video you want to embed in your post, and click the “Share” tab in the video menu. Select the “Embed” tab in the Share menu, and then select “Custom Size” from the drop-down menu. Enter the custom pixel width and height at which you want your YouTube player to display in your blog post. YouTube automatically resizes the height and width to maintain the aspect ratio of the embedded player. Copy the entire embed code to your computer’s clipboard.
Embedding Custom YouTubes on Tumblr
Select the blog to which you want to post the YouTube player from the drop-down list of blogs on your dashboard, if your account has more than one blog. Click the “TEXT” button to create a new text post on your blog. Add any text you want your post to have, including tags and a subject line, and then click the “” button in the post-editing form to switch to HTML view. Paste the YouTube embed code where you want the player to display in the post. Click the down arrow in the “Post” button and select “Preview On Your Blog” to check that the player displays as the size you’d like in your Tumblr layout, and then click the “Post” button to publish the post on your blog. You can embed custom-sized YouTube videos in the Description box of your Tumblr sidebar or header, as well, if your blog’s theme supports the Description box feature. Writer Bio
