Be nice. Or else.
Tech/Design Researcher, Content Writer Joined about 2 years ago
I collected some tips on making the choice on light or dark UI some time ago here. Not to take your time here, there you'll find ideas how interface color scheme influences readability, accessibility, and clarity of the page. https://tubikstudio.com/light-or-dark-ui-tips-choose-proper-color-scheme/
Basically, the purpose of the interface and the target audience are among the most essential factors, as for me. In your case between the examples you show (both good-looking), I would choose the dark interface. The page is not overloaded with the text and fonts are readable, so it won't be hard for users to read the information. Dark background is often associated with the process of coding; for me, it looks more elegant and stylish.
However, I have to support all the previous comments here that mentioned video: in dark background, it's not as obvious and catchy as in light version. So, if you aren't going to change the design to make the video more catchy on the page and want your users to notice that video content, the light version will definitely work better.
P.S. My greeting to the Flawless team, you guys are cool
I would suggest checking some newly-released stuff from the Icons8 team:
Lunacy Editor (Sketch for Windows) https://icons8.com/lunacy
Moose Photos (big collection of high-res stock photos made to work together - all free for a link) https://photos.icons8.com
Fugue (stock of original music tracks for videos and games - all free for link) - https://icons8.com/music/
Also, you may like:
ColorHexa (color encyclopedia) https://www.colorhexa.com/
FontJoy (tool for font pairing) http://fontjoy.com/
Good stuff, worth reading
Be nice. Or else.
Designer News is a large, global community of people working or interested in design and technology.