[Plugin: YouTube SimpleGallery] Widget Display Alignment Issue

I’m experiencing a problem with video alignment in the widget.
There is a huge blank space to the left of the video thumbnail when displaying the video widget as “sidebar default” or “block”,
pushing the video outside the sidebar. If I select to display the widget as a “post” or as “plain text”,then there is no alignment issues.
I need to display the video as “sidebar default” so need some help with the alignment issue please.

I have tried to fix it with css, but whatever changes I make in
css, affects the main gallery as well and I do not want this to happen.
Eg If I remove “position relative” it affects the main gallery as well.

What css class and code can I apply to resolve this issue?

On another note, I also have an issue whereby regardless of whether I display the widget as “post”, on the video page, the widget in the sidebar shows displaced, whereas on all other pages it displays correctly.

https://www.ads-software.com/extend/plugins/youtube-simplegallery/