Why this step carries the weight
If a commissioning is challenged, the question is usually whether you were satisfied of the deponent's identity and whether they acted freely. On video you lose some of the cues you would have in person, so your process and your record have to do more work.
What to look at
Ask the deponent to hold government-issued photo identification to the camera long enough to read it and compare the photo to the person. Confirm the name matches the document being sworn. If the image is unclear, ask them to adjust lighting or the camera rather than proceeding on a poor view.
Identification you should be cautious about
Ontario health cards carry a statutory restriction on requiring their production; avoid relying on OHIP as identification. Expired identification, photocopies and images of ID rather than the physical card are weaker and often not appropriate. Prefer current, physical, government photo identification.
Watching for pressure
Ask open questions and let the deponent answer in their own words. Be alert to someone off-camera prompting them, to reluctance, or to answers that don't fit the document. If you are not satisfied the person understands and is acting freely, do not commission — reschedule or move to an in-person appointment.
What to record
Note the type of identification relied on and that you compared it to the person on camera. You are not building a dossier — record enough to show, later, that you took reasonable steps to be satisfied of identity.