doc: Revise Opening a video source and add images.

source/en/latest/get-handbrake/check-for-updates.markdown

@@ -30,4 +30,4 @@ If an update is available, you will be given the opportunity to install it right
 
 ## Next steps
 
-Continue to [Opening a video](../workflow/open-video.html).
+Continue to [Opening a video](../workflow/open-video-source.html).

source/en/latest/table-of-contents.markdown

@@ -33,7 +33,7 @@ Table of contents
 
 ## Making videos
 
-- [Opening a video](workflow/open-video.html) - How to get your videos into HandBrake
+- [Opening a video source](workflow/open-video-source.html) - How to get your videos into HandBrake
 - [Selecting a preset](workflow/select-preset.html) - Tailored settings for instant compatibility with many devices
 - [Adjusting quality](workflow/adjust-quality.html) - Easily increase visual quality or reduce file size
   <!-- TODO: To clean up a poor-looking source video, see restoration -->

source/en/latest/workflow/open-video-source.markdown

@@ -1,5 +1,5 @@
 ---
-Title:           Opening a video
+Title:           Opening a video source
 Project:         HandBrake
 Project_URL:     https://handbrake.fr/
 Project_Version: Latest
@@ -13,10 +13,14 @@ License_Abbr:    CC BY-SA 4.0
 License_URL:     https://handbrake.fr/docs/license.html
 ---
 
-Opening a video
-===============
+Opening a video source
+======================
 
-In HandBrake terms, the original video you already have is called the `Source`. One of HandBrake's strengths is its ability to open `Sources` in a wide variety of video formats, including but not limited to:
+Once you've [downloaded and installed HandBrake](../get-handbrake/download-and-install.html), it's time to open a video for encoding.
+
+## About sources
+
+In HandBrake terms, the video you already have is called the `Source`. One of HandBrake's strengths is its ability to open `Sources` in a wide variety of video formats, including but not limited to:
 
 - Videos made by mobile phones, tablets, and many video cameras and DSLRs
 - Screen and game recordings, web videos, video editing projects[^consumer-editor-export], and other computer-related sources
@@ -29,28 +33,28 @@ Learn more about [source formats](../technical/source-formats.html).
 
 **Note:** HandBrake does not defeat or circumvent [copy protection](https://en.wikipedia.org/wiki/Copy_protection) of any kind. It does not work with video files employing [Digital Rights Management](https://en.wikipedia.org/wiki/Digital_rights_management) (DRM). See [About HandBrake](../introduction/about.html) for more information about what HandBrake *does* and *does not*.
 
-## Using the Open Source dialog
+## Ways to open a video source
 
-At the top of HandBrake's main window, you'll see a toolbar with various buttons.
+By default, HandBrake presents the `Open Source` dialog on launch. It is also accessable from the `Toolbar` at the top of HandBrake's main window.
 
-![Main window toolbar](../images/toolbar.png)
+![Main window toolbar](../images/toolbar.png "The Toolbar provides easy access to HandBrake's most common functions.")
 
-Select the `Open Source` button to select the video you want to open.
+![Open Source button](../images/open-source-button.png "The Open Source button opens the Open Source dialog.")
 
-![Open Source button](../images/open-source-button.png)
+Select the `Open Source` button to select the video you want to open. You can also drag and drop a video `Source` onto HandBrake's main window.
 
-![Open Source dialog](../images/open-source-dialog.png)
+![Open Source dialog](../images/open-source-dialog.png "The Open Source dialog allows you to browse your files for a video to open.")
 
-## Dragging and dropping
+![Opening a video source via drag and drop](../images/open-source-drag-drop.png "In addition to the Open Source dialog, you may also open a video by dragging it to HandBrake's main window.")
 
-You can also drag and drop a video `Source` onto HandBrake's main window.
+HandBrake will scan your selection and after a few moments, the main window will show the file name of the `Source` you opened along with some additional information.
 
-![Opening a video source via drag and drop](../images/drag-and-drop-source.png)
-
-## Next steps
+![Successfully opened source](../images/open-source-success.png "HandBrake's main window after sucessfully opening a source.")
 
 Great! At this point, HandBrake knows which video you want to use.
 
+## Next steps
+
 If HandBrake didn't open your video as as expected or you had some other trouble, you can continue reading to learn more about how HandBrake works or jump right to [Getting help](../help/index.html).
 
 Continue to [Selecting a preset](select-preset.html).