Financial support video

At one of the subscribers to my copy, I watched the video. Below under the video I saw a button for financial support.
How to make the same button on my copy? I did not find a suitable plugin.

it is not a plugin, it is a standard feature. When you edit the video, in the advanced parameters.

Thanks for the help. I’m not always attentive-)
It’s a pity that you cannot insert html markup into Markdown, for example, an iframe form

It would be a security issue. If this is allowed, anyone could inject malware code.