I suggest that your video should show how the JUN speaker works. Because it is a project and not an item on shop, showing how it can connect with a bluetooth device, and recording the sounds it plays would be very helping in customers make the purchase decision. That's the most important thing to show in the video.
I'd also suggest highlighting these features and instructions in the story section of your project. People want to know a) why your bluetooth speaker is different from others out there, b) if it's easy and intuitive to use, c) why you chose to use concrete, d) how is the sound quality, etc. things like that.
The JUN speaker is made of concrete material, the simple ideas to interesting on concrete material is the hardness material that good sound reflect and smooth surface will enhances great sound performance that why we use the the concrete material. The concrete material has been develop over several months of development our product.
Which easy to use, customer can open/close system by hidden switch on bottom case and recharging battery by USB cable with rechargeable hole.
The Jun speaker pairs with Bluetooth enabled mobiles or computers