Following up from the comments’. You may check the following demo page AzureMedia Player (azureedge.net) (updated to add 2 extra subtitles) and notice there is no Captions button.
By looking at the sample AzureMedia Player you can see that we have 2 buttons because we have 2 kinds subtitle and caption.
Just confirming, are you asking is it ok to have 2 buttons (1 for subtitle and 1 for Captions)?
In this demo page AzureMedia Player (azureedge.net) you can control the other button "Caption" by setting the track Kind
. If you have both Kinds then you will have 2 buttons, otherwise, if you have 1 Kind then only 1 button will be displayed.
Just to highlight: Captions vs subtitles
In general, captions are text tracks that are used for closed captioning that enables viewers who need accessibility features in a video player to understand what is being said and the sounds that exist in a video. Subtitles, are text tracks that show the speech and sounds in a different language than the source language. For example, if the source language of a video is English, then the text track would be considered a caption. If an additional language text track is provided, it's considered a subtitle. You can use one text track for both a caption and subtitles, but implementation varies between video player clients.
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