Builds a simple UI which only contains the subtitle overlay, and elements required to support programmatic
subtitle styling (e.g. using uiManager.getSubtitleSettingsManager().fontSize.value = '150').
This UI has no visible UI elements and only serves the purpose of displaying subtitles. Subtitles need to be
enabled programmatically via the Player API.
Builds a simple UI which only contains the subtitle overlay, and elements required to support programmatic subtitle styling (e.g. using
uiManager.getSubtitleSettingsManager().fontSize.value = '150').This UI has no visible UI elements and only serves the purpose of displaying subtitles. Subtitles need to be enabled programmatically via the Player API.