Short answer: live video uses roughly 0.5–2 GB of data per hour depending on quality, so use Wi-Fi when you can and lower the quality on mobile data.
Data
HD streams use the most data. If you're on a mobile plan, switch to a lower quality or watch on Wi-Fi.
Battery
Video and a bright screen drain the battery quickly. Lower the brightness and close other apps.
Privacy on your phone
- Use a private browsing tab.
- Turn off notification previews for cam sites.
- Lock your phone with a code.