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You can change it in: wp-content/plugins/haru-filmmaker/templates/filmmaker/video then open fle single-content-style-1.php or another file depend on your setting.
Go to line 33 or another line and find the code like this:
When you change text the old string in the wp-content/plugins/haru-filmmaker/languages/haru-filmmaker.pot is not updated and use old string.
You need to delete this file then generate new file by follow this topic: