Add forwardRef to ExternalVideo and Video

[andershagbard]

WHY are these changes introduced?

It's hard to add custom controls to video elements without having this.

WHAT is this pull request doing?

This PR adds forwardRef to Video and ExternalVideo components.

HOW to test your changes?

Use components with ref property, as the tests do.

Checklist

• I've read the Contributing Guidelines
• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've added a changeset if this PR contains user-facing or noteworthy changes
• I've added tests to cover my changes
• I've added or updated the documentation

No docs to generate.

[benjaminsehl]

LGTM

[michenly]

hi @andershagbard sorry about the delay. Would you mind resolving the conflicts and try again?

[andershagbard]

Had to change the type for ExternalVideoProps as well, but looks pretty much 1:1 props.

Ref: https://dev.to/fnky/comment/1ebe1