How to Embed/Display/Show Youtube Video in Salesforce Knowledge?

 Use the following steps to Embed Videos into a Knowledge Article.
1. Create a Rich Text Area field.

2. When creating the Article record, in the Rich Text Area field, use Source to enter HTML code. Use the sample code.

Check the following Video<br />
<br />
<iframe allowfullscreen="true" height="300" src="" width="500"></iframe>