Simple Guide to Embedding YouTube Videos in a Drupal Blog Post
If you are planning to embed lots of YouTube videos to Drupal over a course of time, it is a good idea to consider installing modules such as Embedded Media Field, to create customized fields within content types. Such devices provide easier formatting options and the ability to wrap text around the video itself.
However, if you’re simply looking to embed the occasional video to help spice up a blog post, the quickest and easiest way is to directly embed the HTML into the body of your post itself.