To add a video to your post, you will first need a YouTube account. This website will not play back video properly so you must first upload it to a streaming service such as YouTube.
Go to https://youtube.com and log in with your UA username and password.
Log in and upload your video. If you have never logged into YouTube before, you may need to set up your account but YouTube will walk you through the process.
If you need help with how to do this, please see the YouTube help center.
Once your video is uploaded to YouTube, simply copy the URL for the video and paste it into the text area of your blog post. Click Publish/Update and view your post to make sure it looks right.