The video for a Closed Loop Marketing Module (CLM) presentation is playing without audio. Safari or other iOS application videos have audio.
The iPad volume level is audible but:
The Mute button may be set to on
The iPad may be muted by the system settings
Older iPads have a physical Mute button on the side of the device that should not be enabled. Newer iPad models such as the iPad Pro have no physical Mute button and are muted from the Control Center.
Apple Documentation: About the iPad Side Switch
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