If you’re using Jo’s app and there’s no volume – it’s a simple fix.
Access the volume control – and then turn it up – via the iOS control panel – it’s a different control to the physical buttons on the side.
On an iPhone X or later, swipe down from the top-right corner of your screen. To close, swipe up from the bottom of the screen or tap the screen.
On an iPhone 8 or earlier, or iPod touch, swipe up from the bottom edge of any screen. To close, tap the top of the screen or press the Home button.
On an iPad, swipe down from the top-right edge; to close it, swipe up from the bottom.
Also – you’ll notice a volume slider on each video when they go full screen on the app – do make sure that’s slid correctly.
Finally – do double check you don’t have anything connected via bluetooth – we have seen that has been an issue before.