How can I get og:image from resource with VBA excel

With a more recent version of Excel, you could try this:

Sub GetImageFromHead()

    Dim MyUrl As String
    MyUrl = "https://www.bbc.com/reel/video/p08jgfdg/the-truth-about-christopher-columbus"

    'Required library reference: Microsoft XML v6.0
    Dim HttpRequest As MSXML2.XMLHTTP60
    Set HttpRequest = New MSXML2.XMLHTTP60
    HttpRequest.Open "GET", MyUrl, False
    HttpRequest.Send
    
    Dim HtmlDoc As Object
    Set HtmlDoc = CreateObject("htmlfile")
    HtmlDoc.Write HttpRequest.responseText

    'This next line makes sure that the JavaScript on the page gets processed before continuing execution of the code.
    DoEvents 

    'Required library reference: Microsoft HTML Object
    Dim MetaCollection As MSHTML.IHTMLElementCollection
    Set MetaCollection = HtmlDoc.getElementsByTagName("meta")
    
    Dim HtmlElement As MSHTML.IHTMLElement
    For Each HtmlElement In MetaCollection
        If HtmlElement.getAttribute("property") = "og:image" Then
            ActiveSheet.Pictures.Insert (HtmlElement.getAttribute("content"))
        End If
    Next

End Sub

But since your question is for Excel 2007, you would have to define the HttpRequest like this instead:

    'Required library reference: Microsoft XML v3.0 or v5.0
    Dim HttpRequest As MSXML2.XMLHTTP
    Set HttpRequest = New MSXML2.XMLHTTP

And if you wanted a function that would just return the URL as a string instead, you could easily edit the Sub procedure to make it a function taking MyUrl as a parameter and returning the string instead of using it to insert the image in the Activesheet (like this for example).