When you create a HapYak project, you'll need to ensure that your OVP (Brightcove, Wistia, Kaltura, Vimeo, etc...) is not restricting where you can embed the video.
If there are domain restrictions applied to the OVP account or the video itself, you'll create a project but the video window will be black.
The solution? Simply add the following to your list of allowed domains.
If for some reason, you can not add this "wildcard"domain add: