Is your team using qdm.extension for the Ottawa workshop? You can expect psf-extended participants to view the workshop's proceedings over your video link (could be one of these two Skype addresses), so its camera needs resolution, and to be moved to capture all participants who speak.
The psf-extended participants will type Questions/ Responses/ Contributions via a Skype link, so a non-speaker needs to be able to read from/ respond to these remote psf-extended participants.
You have time to think this through, for it to happen with the minimum of intrusion/ inconvenience to you. If still in doubt, you could visit the WSF Cafe, which I anticipate will open around 10am, Thursday 21st August adjacent to the Media Centre (Jock-Turcot University Centre; UCU301 on the map). They may have other suggestions to smooth your communication to the Whole World!
Best wishes
Chris Williams
WSFCafe helper
Adelaide, Australia (Ottawa+13.5hrs)