YouTube link changes in test newsletter

Hi,

We want to embed a Youtube video in the newsletter. Since that's not possible we have made an image from the video and put a link to youtube into it .
When testing the newsletter, the image is clickable but the url is changed.
The original url is: https://www.youtube.com/watch?v=D96XDaMXf2U
And is changed into: https://www.youtube.com/watch?v=!%20D96XDaMXf2U

Do you notiche the !%20 being added? I don't know why that's happening.

Greetings,
Age