I just learned this, and it's extremely relevant to me with the types of stuff I post. Had to share...
To embed an image from Imgur, but have it be smaller... add "l" to the end of the letters in the URL, before the .jpg
For example. If the image URL is https://i.imgur.com/yh6GcvC.jpg, like the one above...
You would make it https://i.imgur.com/yh6GcvCl.jpg
So it would look like this instead:
Video on using Imgur to post pictures. (Android version)
[video=youtube_share;R5pbFEtYE8A]http://youtu.be/R5pbFEtYE8A[/video]