blogger sharing animation gif on facebook not working - facebook-opengraph

Question

I am trying to add a gif to my blogger post and want to share the animated gif to Facebook with an external link. the problem I am facing that the blogger is generating a custom thumbnail for og:image property. instead, I want to use a CDN link of gif which should be shared on Facebook.
Here is my post: I want to use this url instead of the auto generated thumbnail.
<img src ="https://thumbs.gfycat.com/QualifiedHilariousBufflehead-size_restricted.gif">
Here is my header code
<meta content="https://gifs.blogspot.com" name="og:site_name " />
<meta expr:content="data:view.title.escaped" property="og:title" />
<meta expr:content="data:view.description.escaped" property="og:description" />
<b:if cond="data:view.featuredImage">
<meta
expr:content='resizeImage(data:view.featuredImage, 1200, "1200:630")'
property="og:image"
/>
<b:elseif cond="data:widgets" />
<b:loop
reverse="true"
values="data:widgets.Blog.first.posts where (p => p.featuredImage) map (p => p.featuredImage)"
var="imageUrl"
>
<meta
expr:content='resizeImage(data:imageUrl, 1200, "1200:630")'
property="og:image"
/>
</b:loop>
<b:elseif cond="data:blog.postImageUrl" />
<meta
expr:content='resizeImage(data:blog.postImageUrl, 1200, "1200:630")'
property="og:image"
/>
</b:if>
<meta
content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1"
name="viewport"
/>
<title><data:view.title.escaped/></title>
<b:include data="blog" name="all-head-content" />

Answer 1

Try to delete the resize operator
<b:if cond="data:view.featuredImage">
<meta
expr:content='data:view.featuredImage'
property="og:image"
/>
<b:elseif cond="data:widgets" />
<b:loop
reverse="true"
values="data:widgets.Blog.first.posts where (p => p.featuredImage) map (p => p.featuredImage)"
var="imageUrl"
>
<meta
expr:content='data:imageUrl'
property="og:image"
/>
</b:loop>
<b:elseif cond="data:blog.postImageUrl" />
<meta
expr:content='data:blog.postImageUrl'
property="og:image"
/>
</b:if>

Answer 2

I think it can not be done using blogger.
As I see to share a playable GIF on facebook from a link you shared the open graph tags should be like this:
og:image: The link to GIF file
og:url: The same link from og:image
so in blogger you can't do it, unless i guess id you store all the GIF images in a subdomain with the same domain of your blog