Thumbnail of post content
On whatever template you want this behavior, where it calls the_content() (or something related), do this:
if ('' != get_the_post_thumbnail()) the_post_thumbnail(); else the_content();
I don’t know what you mean by thumbnail of post content though. If you mean “content” is the featured image, then yes, specify the desired size in the_post_thumbnail() arguments. If you mean thumbnail of normal text content, is that like an excerpt or a teeny tiny representation of text content? Use the_excerpt() instead of the_content() if that’s what you meant. For teeny tiny text, try setting the CSS of the container to something like font-size: 4px; I fear that would look more like a mistake than intentional.
Yes a tiny representation of the content. Sorry I should of specified a bit more. Specifically I wanted this for video content.
A thumbnail of the video content, when clicked I wanted it to open up to the post page of the video instead of the video playing .
So basically instead of the video playing when clicked…I want it to open up to the post page..only then the video will play when clicked .
Sorry for the slow reply. You would need a static thumbnail image that links to the single post page. I don’t know if there is any way to automatically generate such an image. You could use a generic video icon image. I know that is an awful solution compared to a video screen grab.
You could maybe display a tiny embedded video player that is overlaid by a transparent image that’s within the link, so clicking here follows the link instead of activating the player. Considering how long it takes for many embedded players to load, this isn’t much of a solution either.