I see that message on all the channels: Error loading player: No playable sources found
What can i do if i see that message almost on all the channels;
1. In the address bar, type chrome://settings/content.
2. On the Content settings screen, find the Flash Player listing. Check the status.
3. Select Allow sites to run Flash, and then click Done.
4. To manage Flash Player settings by site, click Manage exceptions.
5. On the Flash exceptions screen, enter the website domain and then choose Allow. When finished adding sites, click Done.
6. Close the Content settings screen.
Are you still having issues? Please check the official post from Google Answers.