Videos on history.com will not play if you have ad-blocking software on your device or on your web browser. To disable ad blockers, follow the instructions here: https://www.history.com/disable-ad-blocker
Some users have reported that connecting via a VPN, or connecting while on a school or work network with strict security settings, will also cause the ad blocker message to appear.
Please temporarily disable any VPN software if you continue to receive the ad blocker message. You can also try contacting your school or workplace's network administrator to find out whether your network settings are preventing you from accessing our website.