I bought your template, to change the look at my site that has 3 years of life and 54402 posts and about 10,000 videos attached.
I can not lose the job done.

the links of videos related to my posts in my old template are registered in (wp_postmeta) in my wordpress database:

example:
wp_postmeta
meta_id 1820718
post_id 54355
meta_key magazin_video_url
meta_value https://vimeo.com/27523800

How can I tell the template to get the video link from meta_value from meta_key (magazin_video_url)?

Or can I change the value of the meta_key in the table in … (what ?????)

I do not think it has not happened before.
Thank you

I have over 10,000 articles with videos in the old template.
now I need to know what php file I need to change to make the videos attached to previous posts.

example: in the old template, edit the post.php file and simply change the video_url value in magazin_video_url

I apologize for the bad English