In Vidyard, you can set the a player to automatically play after a page loads (also known as autoplay).
If you have the same player embedded in more than one location, you can also use a query string to enable autoplay on a "per embed basis" (i.e. autoplay on a specify embed location rather than everywhere the player exists).
You can use the same query string on a sharing page URL. The order of the query strings is not important, but the first one must start with ? and others must start with &.
If you are only embedding the player into one place only, consider setting autoplay in the player behaviour settings.
Learn more about using query strings to override player settings.