This is what worked for me in order to block YouTube the app and YouTube the website on safari. Once I was able to block the app again it automatically worked in safari, I took no extra steps to block the website for downtime.
It took me 3 HOURS to finally block YouTube again because I know for sure it use to block since I was able to unblock the app on Christmas when it first locked for the downtime settings.
So what happened in my case was that I put in the passcode for the screen time in front of my child and set a passcode that he knew (I know stupid me, I was out smarted by an 8 yr old) and that one time I put in the code I allowed for it to extend the YouTube app usage for an ENTIRE DAY, the settings allow 1 minute, 15 minutes, or a whole day.
Since my child knew the passcode he kept unlocking YouTube for an entire day. So at 7am on 1/8 he unlocked it so when the downtime was to start at 9pm that same day YouTube technically still had another 10 hours left for the “extra day” that was already allowed.
I tried everything but wiping out the entire iPad, (which I was going to do tomorrow after work, if I didn’t figure this out)So I deleted YouTube, reset the settings, blocked the website(which just blocked the website completely), changed the limit per day, turned off and on screen time, a million times, restart both my phone and the iPad, NOTHING WORKED.
I had a hunch that it not being blocked had to do with that one extension this morning. So my next and FINAL idea was to change the date and time on the iPad. In order to do that I had to turn of all the screen time settings on my phone and the iPad in order for the iPad to allow me to change the date. I changed the date on my phone as well as the iPad. I fast forward the date exactly 24 hours so to 11:30pm 1/9 instead of 1/8 in my case. Then I turned the screen time back on from my from my phone and LO AND BEHOLD YOUTUBE WAS BLOCKED. The app was blocked and so was the website! Also my time and date went back to normal on both my iPhone and the iPad on it’s own once I enable the screen time.
I had already changed the passcode this morning once I realized that my first attempt at changing the passcode was unsuccessful. So I’m reality the root of all this for me was that my child had the passcode and was extending the usage for an entire day, hence the app not blocking at the set downtime.
I hope that this might help at least one of you in here. Maybe at least one of your children have the passcode and you don’t even know it and they are doing the same thing my child was doing.