Update video alt text

Author: ntrogh

release-notes/v1_103.md

@@ -307,7 +307,7 @@ This feature shows you, per project, the percentage of characters that was inser
 
 The notebook inline chat control can now use the full suite of notebook agent tools to enable additional capabilities like running cells and installing packages into the kernel.
 
-<video src="images/1_103/notebook-inline-agent.mp4" title="Video showing a coding agent session opening in a chat session editor" autoplay loop controls muted></video>
+<video src="images/1_103/notebook-inline-agent.mp4" title="Video showing a coding agent session opening in a chat session editor." autoplay loop controls muted></video>
 
 To enable agent tools in notebooks, enable the new experimental setting `setting(inlineChat.notebookAgent:true)`. This also currently requires enabling the setting for inline chat v2 `setting(inlineChat.enableV2:true)`.
 
@@ -394,7 +394,7 @@ When you hover over a symbol in JavaScript or TypeScript, VS Code tries to show
 
 That's why this iteration, we've added new UI that gives you more control over how types are shown in hovers. When you hover over a symbol, now you can select the little `+` icon on the left side of the hover control to expand the interfaces and complex types in the hover into their components. For example, you can use this to see the properties of an interface directly in the hover:
 
-<video src="images/1_103/ts-expandable-hovers.mp4" title="Expanding interface types" autoplay loop controls muted></video>
+<video src="images/1_103/ts-expandable-hovers.mp4" title="Video showing expanding interface types." autoplay loop controls muted></video>
 
 Hovers can be expanded multiple times, which recursively expands types from the previous expansion. If you ever expand too much, just select the `-` icon to go back to the previous level. Also keep in mind that not every type is expandable and that we still need some limits on just how much expansion we can support. [Let us know](https://github.com/microsoft/vscode/issues/new?template=bug_report.md) if there are any cases where expandable hovers aren't working how you'd like.
 
@@ -426,7 +426,7 @@ Building off [last iteration's Copilot coding agent integration](https://code.vi
 
 * Start a coding agent session from VS Code with the `#copilotCodingAgent` tool or via the [UI controls](https://code.visualstudio.com/updates/v1_102#_start-a-coding-agent-session-preview).
 
-    <video src="images/1_103/coding-agent-start.mp4" title="Video showing a coding agent session opening in a chat session editor" autoplay loop controls muted></video>
+    <video src="images/1_103/coding-agent-start.mp4" title="Video showing a coding agent session opening in a chat session editor." autoplay loop controls muted></video>
 
 * Follow the progress of coding agent in an attached chat editor.