@OMah 

Hi, 

Both Youtube website and App failed to be blocked, or just one of them?

Have you tried to delete the history caches/browser history and check again?

Did you try to block the Youtube under the insight>history?

And there is also a new firmware for Deco X60 V2 recently, please try to manually upload the firmware to the web UI:

Deco X60_V2_1.5.1_20210204

https://static.tp-link.com/2021/202103/20210311/Deco_X60_V2_1.5.1_20210204.zip 

（Since the new firmware upgrade is applied in sequence to the correct devices during the release process, so not all the users would get the new firmware notification in the first place.）

Thank you very much.

@OMah 

Thank you and would you mind trying the new firmware?

And have you tried to clear the Safari caches or DNS browsing history to see whether it helped or not?

At the same time, I would follow up on your case by email, and please have a check later;

@OMah 

Hi, did you receive my email, and could you please update the email as well since later the case needs to be forward to the senior engineers and they could only be reached via email;

PS: The firmware 5.1: Deco X60(US)_V2_1.5.1_20210204  https://static.tp-link.com/2021/202103/20210311/Deco_X60_V2_1.5.1_20210204.zip

It is required to log into the web UI via http://tplinkdeco.net and manually upload the firmware;

If it still not working, please go to Overview>settings on the top left>help>contact us>suggestions and add the system log on the Deco APP;

Thank you very much.