Gutenberg Video Submission Solution In Articles?

Can anyone please help? It has been driving me absolutely insane for quite some time now that when you add any videos in your articles via Gutenberg then you get an ugly black line above the video and at the bottom of the video when the background of the video or video thumbnail is a white colour.

The only solution I could find for this is to make sure my video thumbnails uploaded to YouTube does not have a white background to avoid these black lines.

Although I mostly use my own created videos in my articles I do sometimes embed the videos of other creators in my articles and here I have no control over the thumbnail and is a problem when the thumbnail background happens to be white. See the issue in the screenshot below. The two black lines. One at the top and one at the bottom.

With each new WordPress update I am thinking that surely this issue will be addressed, but they just never do. I have not seen this issue pop up when making use of any other WordPress builder.

Does anyone have a solution for this? If so, it will be much appreciated.

Ps. I was going to put this under the "ask a question" section, but there is no option to upload an image there. Also the thumbnail may be a bit deceptive in appearance. When you click so the video starts playing the video fills in the full area where the black lines can be seen - so in short the black lines will no longer be there when the video starts playing. It fills in the whole area as can be seen below.

Here is an image of the html code I tried too and still getting the black lines. So no matter whether using html or using the YouTube block in Gutenberg to add the YouTube url - same result.

Many thanks for your help in advance.

Schalk