How to add a video to the Learning Path (#564)

* How to add a video to the Learning Path

* How to get access to the InnerSource Commons YouTube

* Instruction to add subtitles

* Update upload-new-video.md

Author: rrrutledge

docs/upload-new-video.md

@@ -0,0 +1,13 @@
+# How to Upload a Video for a New Segment
+
+1.  Create the video file.
+2.  Create the [thumbnail].
+3.  Upload to [InnerSource Commons YouTube] (you can ask for access in the [#learning-path] channel).
+4.  Add [subtitles].
+5.  Add YouTube URL to [urls.yaml] ([example](https://github.com/InnerSourceCommons/InnerSourceLearningPath/pull/563)).
+
+[thumbnail]: https://github.com/InnerSourceCommons/InnerSourceLearningPath/blob/main/assets/thumbnails/thumbnail_rationale.asciidoc
+[InnerSource Commons YouTube]: https://www.youtube.com/@InnerSourceCommons/videos
+[urls.yaml]: https://github.com/InnerSourceCommons/InnerSourceLearningPath/blob/main/config/urls.yaml
+[#learning-path]: https://app.slack.com/client/T04PXKRM0/CARTU4XV2
+[subtitles]: https://github.com/InnerSourceCommons/InnerSourceLearningPath/blob/main/CONTRIBUTING.md#video-subtitles