Typically, videos are not directly uploaded to HapYak. Rather, videos remain where they always have been (an existing video host, locally hosted on a server, etc...). Users copy the link or embed code of the video and paste it into the "URL Or Embed Code" tab in the "New Project" menu on HapYak and then add annotations. If you don't have a video provider, we'd be happy to recommend one!
Alternatively, users can upload an .mp4 file directly to HapYak by choosing the "Upload" tab in the "New Project" menu and selecting the file on their system.