help: Update "View and browse images".

- Changes page title to View images and videos.
- Tweaks intro paragraph and adds desktop/web instructions.
- Splits out browsing other images in the view into its own section.
- Updates page to describe interactions with videos too.
- Tweaks documentation on other pages.

Fixes #27801.

help/include/sidebar_index.md

@@ -104,7 +104,7 @@
 * [Emoji reactions](/help/emoji-reactions)
 * [View your mentions](/help/view-your-mentions)
 * [Star a message](/help/star-a-message)
-* [View and browse images](/help/view-and-browse-images)
+* [View images and videos](/help/view-and-browse-images)
 * [View messages sent by a user](/help/view-messages-sent-by-a-user)
 * [Link to a message or conversation](/help/link-to-a-message-or-conversation)
 * [Searching for messages](/help/search-for-messages)

help/manage-your-uploaded-files.md

@@ -63,4 +63,4 @@ You can sort your uploaded files by name, upload date, message ID, and size.
 ## Related articles
 
 * [Share and upload files](/help/share-and-upload-files)
-* [View and browse images](/help/view-and-browse-images)
+* [View images and videos](/help/view-and-browse-images)

help/search-for-messages.md

@@ -77,12 +77,13 @@ Zulip offers the following filters based on the location of the message.
 * `has:link`: Search messages that contain URLs.
 * `has:attachment`: Search messages that contain an [uploaded
   file](/help/share-and-upload-files).
-* `has:image`: Search messages that contain an uploaded image or link to an image.
+* `has:image`: Search messages that contain uploaded or linked images or videos.
 
 !!! tip ""
 
-    You can also [view](/help/manage-your-uploaded-files) all the files you have uploaded
-    or [browse](/help/view-and-browse-images) all the images in the current view.
+    You can also [view](/help/manage-your-uploaded-files) all the files you
+    have uploaded or [browse](/help/view-and-browse-images) all the images and
+    videos in the current view.
 
 ### Search your important messages
 

help/share-and-upload-files.md

@@ -4,9 +4,9 @@ Zulip supports attaching multiple files to messages, including images,
 documents, sound, and video. You can edit the names of the files others see
 after you upload them.
 
-Zulip will automatically generate a **thumbnail** for each file when you send
-the message, if it can. Image thumbnails will be shown directly in the message,
-and you can click on a thumbnail to [view the full image](/help/view-and-browse-images).
+For images and videos, a small preview will be shown directly in the message.
+People reading the message can click on the preview to
+[view the full-size image or video](/help/view-and-browse-images).
 
 ## Uploading files
 
@@ -125,5 +125,5 @@ This limit can be changed by the server administrator.
 ## Related articles
 
 * [Manage your uploaded files](/help/manage-your-uploaded-files)
-* [View and browse images](/help/view-and-browse-images)
+* [View images and videos](/help/view-and-browse-images)
 * [Animated GIFs](/help/animated-gifs-from-giphy)

help/view-and-browse-images.md

@@ -1,26 +1,37 @@
-# View and browse images
+# View images and videos
 
-When someone pastes or attaches an image to a message, Zulip shows a small
-preview. Click on the image preview to open the **image viewer**.
+Zulip shows previews of attached images and videos, unless previews are
+[disabled](/help/allow-image-link-previews) in your organization. You
+can click on a preview to view an image in more detail, or to play a
+video. Zulip also makes it convenient to browse all images and videos
+attached to messages in your current view.
 
-In the image viewer, you can:
+## Using the image viewer
+
+{start_tabs}
+
+{tab|desktop-web}
+
+1. Click an image preview to open the **image viewer**.
+
+1. You can interact with the image.
 
     * Zoom in and out of the image
 
     * Click and drag the image
 
-* **Reset zoom** so that the image is recentered and its original size
+    * **Reset zoom** so that the image is recentered and back to its original size
 
-* **Open** the image in a new browser tab
+    * **Open** the image in a new browser tab if you are using the Zulip web app
 
     * **Download** the image
 
-* Browse other images in the current view. For example, if you're in a
-  stream view, the image browser will show all the images from that stream. If
-  you do a [search](/help/search-for-messages), the image browser will show
-  all images in messages that matched that search.
+1. Click anywhere outside the image to close the image viewer once you are done.
 
-Exit the image viewer by clicking anywhere outside the image.
+!!! tip ""
+
+    You can click on the file name to download an image rather than viewing it
+    in the Zulip app.
 
 !!! keyboard_tip ""
 
@@ -28,9 +39,30 @@ Exit the image viewer by clicking anywhere outside the image.
     <kbd>Z</kbd> and <kbd>Z</kbd> to zoom in and out of the image. Use
     <kbd>V</kbd> or <kbd>Esc</kbd> to **close** the image viewer.
 
-## Troubleshooting
+{end_tabs}
 
-To open the image viewer, you must click on the image preview, not the file name.
+## Using the image browser
+
+In the Zulip desktop or web app, you can browse the images in the current view.
+For example, if you're in a conversation view, the image browser will show all
+the images from that stream. If you do a [search](/help/search-for-messages),
+the image browser will show all images in messages that matched that search.
+
+{start_tabs}
+
+{tab|desktop-web}
+
+1. Click an image preview or use <kbd>V</kbd> to open the **image viewer**.
+
+1. You can click an image or use the left and right buttons at the bottom of
+   the viewer to browse images.
+
+!!! keyboard_tip ""
+
+    Use <kbd class="arrow-key">←</kbd> and <kbd class="arrow-key">→</kbd>
+    to scroll through the images.
+
+{end_tabs}
 
 ## Related articles