Add switch and AB test for looping video test

Co-authored-by: Freddie Preece <freddiepreece@outlook.com>

common/app/conf/switches/ABTestSwitches.scala

@@ -92,4 +92,15 @@ trait ABTestSwitches {
     exposeClientSide = true,
     highImpact = false,
   )
+
+  Switch(
+    ABTests,
+    "loop-video-test",
+    "Test looping videos effect on Core Web Vitals",
+    owners = Seq(Owner.withEmail("fronts.and.curation@guardian.co.uk")),
+    safeState = Off,
+    sellByDate = Some(LocalDate.of(2025, 5, 28)),
+    exposeClientSide = true,
+    highImpact = false,
+  )
 }

static/src/javascripts/projects/common/modules/experiments/ab-tests.ts

@@ -1,5 +1,6 @@
 import type { ABTest } from '@guardian/ab-core';
 import { auxiaSignInGate } from './tests/auxia-sign-in-gate';
+import { loopVideoTest } from './tests/loop-video-cwv';
 import { remoteRRHeaderLinksTest } from './tests/remote-header-test';
 import { signInGateMainControl } from './tests/sign-in-gate-main-control';
 import { signInGateMainVariant } from './tests/sign-in-gate-main-variant';
@@ -11,4 +12,5 @@ export const concurrentTests: readonly ABTest[] = [
 	signInGateMainControl,
 	remoteRRHeaderLinksTest,
 	auxiaSignInGate,
+	loopVideoTest,
 ];

static/src/javascripts/projects/common/modules/experiments/tests/loop-video-cwv.js

@@ -0,0 +1,24 @@
+export const loopVideoTest = {
+	id: 'LoopVideoTest',
+	start: '2025-02-06',
+	expiry: '2025-05-28',
+	author: 'fronts.and.curation@guardian.co.uk',
+	description: 'Test looping videos effect on Core Web Vitals',
+	audience: 0,
+	audienceOffset: 0,
+	successMeasure:
+		'Core Web Vitals are not significantly negatively affected.',
+	audienceCriteria: 'This will not be shown to any users',
+	showForSensitive: true,
+	canRun: () => true,
+	variants: [
+		{
+			id: 'control',
+			test: () => {},
+		},
+		{
+			id: 'variant',
+			test: () => {},
+		},
+	],
+};