ALL VIDEO CREDIT TO SAD-IST

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The colours can reflect the highlights of the scene to make the subtitles stand out more.

I experimented with matching the direction of lighting for extra effect.

Removing the black background and changing the font and colour already makes a huge difference.

If there are any frames for effect, like the strike of a sword shown here, the subtitles can match, and add to that attention to detail. In my opinion, this is where the subtitles really start to add to the video.

Big moment in the video? A larger font will help sell that.

Placing the subtitles within the video to match text on screen is great for translations, and a great effect too.