It's a youtube embed player inside a lightning component.
There's just enough CSS to make this full-width fluid responsive, so you don't have to try to manage iframe height/width.
You can use it in AppBuilder, CommunityBuilder, or inside another component that you're building.
attributes/design params are
- video Id
- start time (in seconds)
- end time (in seconds)
Simple, but often needed.
![Deploy to Salesforce](https://raw.githubusercontent.com/afawcett/githubsfdeploy/master/deploy.png)