Add temp debugging

Author: sanason

.github/workflows/ci.yml

@@ -23,4 +23,4 @@ jobs:
         # aa-exec applies Ubuntu's AppArmor profile for stable Chrome binaries to the Chrome for Testing binary downloaded by Puppeteer
         # Without it, Puppeteer fails with error "No usable sandbox!"
         # See https://pptr.dev/troubleshooting#issues-with-apparmor-on-ubuntu
-        run: npm run test-site-dev & sleep 20; aa-exec -p chrome -- npm run cucumber
+        run: npm run test-site-dev & sleep 20; VERBOSE=true aa-exec -p chrome -- npm run cucumber

features/support/step_definitions/youtube_steps.js

@@ -6,6 +6,7 @@ When("I wait for the YouTube iframe API to load", async function () {
 
 When("I play YouTube video {string}", async function (videoId) {
   await this.page.evaluate((id) => {
+    window.addEventListener('message', (event) => console.log(JSON.stringify(event.data)));
     const iframe = document.querySelector('iframe[id="' + id + '"]');
     const origin = new URL(iframe.src).origin;
     iframe.contentWindow.postMessage(JSON.stringify({ event: 'command', func: 'playVideo', args: [] }), origin);