Adding video snaps

[Drdave79]

Hi all. Rpi4 self image. I've tried scraping from Retroarch from both sources and it just doesn't seem to work for me. So what I've done is manually edit the gamelist.xml file for the specific emulator to point to video snaps that I do have.

Below is an example. This game is missing the <video>./snap/Age of Zombies (USA).mp4</video> line. So I have to type it in manually. Is there a consistent way to automate this rather than typing it in manually? Thank you.

<game>
	<path>./Age of Zombies (USA).cso</path>
	<name>Age of Zombies</name>
	<desc>In the Age of Zombies, our hero Barry Steakfries employs the use of time portals to stop the evil zombie scheme of Professor Brains. Using a huge pile of weapons and explosives, Steakfries is the real deal for blood-splattering needs. Played as a top-down shooter and offering style and flair through humor, intense action and zombie blasting carnage, Age of Zombies puts Steakfries up against the zombie masses and says, "good luck!"</desc>
	<image>~/.emulationstation/downloaded_images/pspminis/Age of Zombies (USA)-image.jpg</image>
	<releasedate>20100225T000000</releasedate>
	<developer>Halfbrick Studios</developer>
	<publisher>Halfbrick Studios</publisher>
	<genre>Action</genre>
</game>

[sleve_mcdichael]

@drdave79 both of the optional scrapers (I use Skyscraper) can scrape from local sources:

https://github.com/muldjord/skyscraper/blob/master/docs/IMPORT.md