Fix issue sending the duckPlayerWatchOnYoutube pixel (#3114)

Task/Issue URL:
https://app.asana.com/0/1207252092703676/1208089112886056/f

**Description**:
Fix issue sending the watch on youtube pixel

DuckDuckGo/Tab/TabExtensions/DuckPlayerTabExtension.swift

@@ -307,8 +307,7 @@ extension DuckPlayerTabExtension: NavigationResponder {
 
         // “Watch in YouTube” selected
         // when currently displayed content is the Duck Player and loading a YouTube URL, don‘t override it
-        if navigationAction.targetFrame?.url.isDuckPlayer == true,
-           navigationAction.targetFrame?.url.youtubeVideoID == videoID {
+        if didUserSelectWatchInYoutubeFromDuckPlayer(navigationAction, preferences: preferences, videoID: videoID) {
             PixelKit.fire(GeneralPixel.duckPlayerWatchOnYoutube)
             return .next
 
@@ -344,6 +343,11 @@ extension DuckPlayerTabExtension: NavigationResponder {
         return .next
     }
 
+    private func didUserSelectWatchInYoutubeFromDuckPlayer(_ navigationAction: NavigationAction, preferences: DuckPlayerPreferences, videoID: String) -> Bool {
+        let url = preferences.duckPlayerOpenInNewTab ? navigationAction.sourceFrame.url : navigationAction.targetFrame?.url
+        return url?.isDuckPlayer == true && url?.youtubeVideoID == videoID
+    }
+
     func didCommit(_ navigation: Navigation) {
         guard duckPlayer.isAvailable, duckPlayer.mode != .disabled else {
             return