Video Type: Format for duration and upload date

Hi,

I am experimenting with the video type of rich snippet and I am wondering what the format is to enter the duration. For 34 minutes and 27 secs I tried 34:27 and 003427…Also I used the google testing tool and it doesnt find the video at all…no thumbnail, no description or anything…

Regards,
Matt

https://wordpress.org/plugins/all-in-one-schemaorg-rich-snippets/