Add Youbora addtional params via UI Variables

Hi,

how I can to add aditional parameters to send Youbora using the Studio pluguin (https://knowledge.kaltura.com/youbora-player-plugin-setup-and-information-guide#contentMetadata) . I would like to avoid to add the flashvar in the HTML player call.

Could I use the UI Variables fields in the Studio to send additional params to Youbora?

thanks so much

Lluís