How do I edit the title, description and other information about a video?
For videos created in or uploaded to My Media / Media Gallery or MediaSpace, you can edit the title, description, tags, and other informational items -- these are collectively called the "meta-data".
Follow these steps to edit the meta-data for a video --
Open the video in Canvas in My Media or Media Gallery, or open it in MediaSpace

Under the video click the "ACTIONS" tab and choose "Edit"

NOTE: be sure to choose "Edit" rather than "Launch Editor"
"Edit" will let you to edit information about the video (meta-data), whereas "Launch Editor" will let you edit the video itself.
Under the video playback window you'll see a row of tabs where you can edit different aspects of the video

Here's a brief summary of what the different tabs are for:
Details: to edit the name, description, and tags for the video. You can also set a time range when it will be published.
Publish: to select which Canvas courses you would like the video to be available in.
Options: to enable or disable comments, close commenting, and/or allow clips to be created from the video
Collaboration: to add another person as an owner or collaborator on the video
Thumbnails: to set which frame of video or which uploaded image will be the video thumbnail
Downloads: to download the video
Captions: to manage machine captions that have been created for the video. See this guide to learn more about captioning.
Attachments: to manage and upload files that are attachments for the video
Timeline: to create chapters for the video and upload slides to play along with the video
Replace Media: to swap in different video content replacing the current content.
Reminder: Always click "Save" when you're done making changes to the meta-data.
