Merge pull request #15739 from guardian/sh/use-consistent-lower-case-self-hosted-video-id

Consistently sets self hosted video tracking ID

Author: SHession

dotcom-rendering/src/components/SelfHostedVideoPlayer.tsx

@@ -206,7 +206,7 @@ export const SelfHostedVideoPlayer = forwardRef(
 		const showProgressBar = canShowProgressBar && currentRefExists;
 		const showIcons = canShowIcons && currentRefExists;
 
-		const dataLinkName = `gu-video-${videoStyle}-${
+		const dataLinkName = `gu-video-${videoStyle.toLowerCase()}-${
 			showPlayIcon ? 'play' : 'pause'
 		}-${atomId}`;