If someone has email spam filtering software for their enterprise email, what does a vidyard email look like? Are we going straight to spam, or showing up as a box with the "X" label as an undownloaded image?

Vidyard uses web based images that hyperlink to a sharing page with the video, so it's unlikely that it would ever end up in spam or filtered because of 'video'. If the recipient has blocked web images, most likely in a desktop email client, then the Vidyard created text hyperlink (underneath where the image should render) can be used. There are tools on the web that you can use to check how 'spammable' your email likely are if there are general concerns.