diff --git a/packages/svelte/CHANGELOG.md b/packages/svelte/CHANGELOG.md
index 2e7cfb50cb..755f58bd06 100644
--- a/packages/svelte/CHANGELOG.md
+++ b/packages/svelte/CHANGELOG.md
@@ -1,5 +1,13 @@
 # svelte
 
+## 5.45.6
+
+### Patch Changes
+
+- fix: don't issue a11y warning for `<video>` without captions if it has no `src` ([#17311](https://github.com/sveltejs/svelte/pull/17311))
+
+- fix: add `srcObject` to permitted `<audio>`/`<video>` attributes ([#17310](https://github.com/sveltejs/svelte/pull/17310))
+
 ## 5.45.5
 
 ### Patch Changes
diff --git a/packages/svelte/elements.d.ts b/packages/svelte/elements.d.ts
index 17ff100729..606e1ca8cf 100644
--- a/packages/svelte/elements.d.ts
+++ b/packages/svelte/elements.d.ts
@@ -1239,6 +1239,7 @@ export interface HTMLMediaAttributes<T extends HTMLMediaElement> extends HTMLAtt
 	playsinline?: boolean | undefined | null;
 	preload?: 'auto' | 'none' | 'metadata' | '' | undefined | null;
 	src?: string | undefined | null;
+	srcobject?: MediaStream | MediaSource | File | Blob;
 	/**
 	 * a value between 0 and 1
 	 */
diff --git a/packages/svelte/package.json b/packages/svelte/package.json
index c39a6676fd..a8f085dbd4 100644
--- a/packages/svelte/package.json
+++ b/packages/svelte/package.json
@@ -2,7 +2,7 @@
   "name": "svelte",
   "description": "Cybernetically enhanced web apps",
   "license": "MIT",
-  "version": "5.45.5",
+  "version": "5.45.6",
   "type": "module",
   "types": "./types/index.d.ts",
   "engines": {
diff --git a/packages/svelte/src/compiler/phases/2-analyze/visitors/shared/a11y/index.js b/packages/svelte/src/compiler/phases/2-analyze/visitors/shared/a11y/index.js
index 8c5bf55e5f..717ee4bf50 100644
--- a/packages/svelte/src/compiler/phases/2-analyze/visitors/shared/a11y/index.js
+++ b/packages/svelte/src/compiler/phases/2-analyze/visitors/shared/a11y/index.js
@@ -486,9 +486,17 @@ export function check_element(node, context) {
 		case 'video': {
 			const aria_hidden_attribute = attribute_map.get('aria-hidden');
 			const aria_hidden_exist = aria_hidden_attribute && get_static_value(aria_hidden_attribute);
+
 			if (attribute_map.has('muted') || aria_hidden_exist === 'true' || has_spread) {
 				return;
 			}
+
+			if (!attribute_map.has('src')) {
+				// don't warn about missing captions if `<video>` has no `src` —
+				// could e.g. be playing a MediaStream
+				return;
+			}
+
 			let has_caption = false;
 			const track = /** @type {AST.RegularElement | undefined} */ (
 				node.fragment.nodes.find((i) => i.type === 'RegularElement' && i.name === 'track')
diff --git a/packages/svelte/src/version.js b/packages/svelte/src/version.js
index 2ed4a8a710..9be5192733 100644
--- a/packages/svelte/src/version.js
+++ b/packages/svelte/src/version.js
@@ -4,5 +4,5 @@
  * The current version, as set in package.json.
  * @type {string}
  */
-export const VERSION = '5.45.5';
+export const VERSION = '5.45.6';
 export const PUBLIC_VERSION = '5';
diff --git a/packages/svelte/tests/validator/samples/a11y-media-has-caption/input.svelte b/packages/svelte/tests/validator/samples/a11y-media-has-caption/input.svelte
index 2e479d97da..9d83ca8771 100644
--- a/packages/svelte/tests/validator/samples/a11y-media-has-caption/input.svelte
+++ b/packages/svelte/tests/validator/samples/a11y-media-has-caption/input.svelte
@@ -1,6 +1,7 @@
-<video><track kind="captions"/></video>
-<video></video>
-<video><track /></video>
+<video src="x"><track kind="captions"/></video>
+<video src="x"></video>
+<video src="x"><track /></video>
 <audio></audio>
-<video aria-hidden="true"></video>
-<video aria-hidden="false"></video>
+<video src="x" aria-hidden="true"></video>
+<video src="x" aria-hidden="false"></video>
+<video></video> <!-- no src -->
diff --git a/packages/svelte/tests/validator/samples/a11y-media-has-caption/warnings.json b/packages/svelte/tests/validator/samples/a11y-media-has-caption/warnings.json
index 2a7de1f730..c596f23806 100644
--- a/packages/svelte/tests/validator/samples/a11y-media-has-caption/warnings.json
+++ b/packages/svelte/tests/validator/samples/a11y-media-has-caption/warnings.json
@@ -2,7 +2,7 @@
 	{
 		"code": "a11y_media_has_caption",
 		"end": {
-			"column": 15,
+			"column": 23,
 			"line": 2
 		},
 		"message": "`<video>` elements must have a `<track kind=\"captions\">`",
@@ -14,7 +14,7 @@
 	{
 		"code": "a11y_media_has_caption",
 		"end": {
-			"column": 24,
+			"column": 32,
 			"line": 3
 		},
 		"message": "`<video>` elements must have a `<track kind=\"captions\">`",
@@ -26,7 +26,7 @@
 	{
 		"code": "a11y_media_has_caption",
 		"end": {
-			"column": 35,
+			"column": 43,
 			"line": 6
 		},
 		"message": "`<video>` elements must have a `<track kind=\"captions\">`",