I was trying to add the product videos with the product images. It does show an option to upload a product video in the media section but it does not show on the frontend. Why is it so?
For example this product: https://pdn.london/collections/the-collections/products/barbera-column-dress-linen-blue
At the backend, video is added to the media section but it is not showing: https://prnt.sc/tyw52j
Please guide me here, what is going wrong here.
Note: The video I have added in the content section is different from the one in the media section, it has been added as an alternative, so don't say the video is showing
I understand your concern. I checked in screen-shot you added video to product which is right and it's default feature of Shopify. But seems the theme you using doesn't support the video or we can say theme you are using is not coded in way that it can display video as you want.
To cross-check you can check product in any other theme preview mode which support product video in gallery.
And once you confirmed you have to implement code in the theme you are using so it can start showing video in gallery.