No, the video transcript does not mention bread.
The transcript does not specifically mention flours of any type.
This video provides guidance for singers and professional voice users on which foods to limit or avoid, especially before performances, to maintain vocal health. It explains the anatomy relevant to eating and breathing, clarifying why certain foods can negatively impact the voice, primarily through indirect effects like reflux or dehydration.
The closest topics mentioned in relation to food and their impact on the voice are:
While "flour" itself isn't named, these categories cover food items that would typically be made with or contain flour.
The video primarily focuses on foods to avoid before performances and discusses the negative impacts certain foods can have. However, it does implicitly mention beneficial practices:
The overall message is that singers should experiment to find what personally benefits their voice, but the direct recommendations for beneficial foods are limited to these points.