How Add Metafields Here?

[rgeafrauuhf]

Hello Does Anyone Know How To Add Metafields.. where we paste links of youtube videos as shown in screenshot

i had crested a metafiled for product its type is link, and i will paste there youtube links, it will different from every product.. so thats the reson i wanna add this link metafield

see i had marked yellow circle there i want metafield option of links 

[ProtoMan44 · Accepted solution]

@rgeafrauuhf please use this way of metafield to add src URL from the product. 

<iframe src="{{ product.metafields.namespace.key }}"