I've not seen the video, so I'm not 100% sure what the label is on the video. However, the label could have been applied by the volunteers who were putting it together, or it could have been applied by the non-political audiovisual company that was preparing the event and that wouldn't have even been aware of the politics of it.
The video would have been passed by the Speaker's team to John Fraser's friends and family who were putting together and collecting things. Then it would have been passed on to the Ontario Liberal Party, and then prepared for technical presentation. It could have been, and likely was, edited by the AV company that was employed to help us out with the event, or it could have been applied by the many volunteers who were preparing the event.