Hi,
If I copy a video URL in Youtube with a custom start time, I can put that URL in with the Allvideos Youtube tags in a Joomla article.
For example, the start time is at 30:00

When I refresh the website, I see the video with a set start time.
But the next day I checked again and I see the start time again at 0:00.

When I look at the code in the article the next day, the code is still the same. So with the addition of the specific start time. But it is not shown that way on the website.

Does anyone know why the start time is not remembered?

I received this answer by email:

Go to YouTube.com, find the video you want to share, and follow these instructions.
1 Click Share directly beneath the video.
2 In the pop-up box, check the box next to Start at.
3 Enter the time you want the video to start. ...
4 Select Copy to copy the time-stamped URL.

But that is exactly what I did.
I entered the time where the video have to start.
In my case 30.35
Then I copy the code and used that between the youtube tags in my article.
When I visit the frontend I see two options. Once the video is starting at 0.00 and an other time the video starts at 30.03
Not 30.25

So I am not sure what I am doing wrong, but this is not good.