Will adding to a video's length affect my Rich Snippets?

[Brocberry]

Most people get to the end of my videos, 85% or so, but there's no call to action at the end of them. So I'd like to suggest what they could do or read next; along the lines of 'Add to basket and receive your XYZ tomorrow'. This will make the video longer and therefore google will know it has changed, I guess. I see no reason for them to object to this but you never you.

[PhilNottingham]

Shouldn't be an issue - Just make sure you update the <video<span id="GRmark_2ce5acbd7b47b7ac2b2825e56148aff00b0d7c8d_::0" class="GRcorrect">:duration> field in your video sitemap to reflect the extended length.</video<span>

Alternatively, can you just add a JavaScript link overlay as the call to action? You wouldn't need to increase the length of the video to do this.