Video calling is live communication that lets people see and hear each other from different locations. Modern video calls usually use an internet-connected phone, tablet, or computer, with an app or browser service carrying the audio and camera video.
You can use a video call for a personal conversation, a team meeting, or customer support. This guide explains how it works, what you need, how it differs from screen sharing and recordings, and how to prepare for a useful call.
What does video calling mean?
A video call is a conversation happening in real time. Your camera supplies the picture, your microphone supplies sound, and the service delivers those streams to the other participants. People may join with their camera off or use audio only, depending on the service and their preferences.
“Video chat” is often used for the same activity. “Videotelephony” describes communication combining telephone-like conversation with video. These names do not tell you which features, devices, or security settings a particular service supports.
Video calls, conferences, screen sharing, and recordings
| Term | What it describes | Example |
|---|---|---|
| Video call | A live conversation with camera video and audio. | A customer speaks with a support agent. |
| Video conference | A live meeting, often involving a group and meeting-management features. | A distributed team reviews a project together. |
| Screen sharing | Showing a screen, window, or tab to other participants. | A customer shows the page where an error occurs. |
| Screen recording | Capturing activity for later playback. | A customer sends a short demonstration without joining a call. |
Video calling and conferencing overlap; there is no universal participant count that separates them. Screen sharing is a separate feature, and showing a screen does not itself give someone control of the device.
What do you need for a video call?
- A compatible device: a phone, tablet, or computer supported by the service.
- A camera and microphone: built-in or external devices, with the appropriate permissions enabled.
- Speakers or headphones: headphones can help reduce feedback from speakers into the microphone.
- A suitable connection: enough reliable network capacity for the service and call format.
- A supported app or browser: check the invitation and provider’s requirements.
- Access to the call: a meeting link, contact, or invitation, plus any account or passcode the host requires.
Requirements vary. A browser-based service may let a guest join without installing an app, while another may require an app or account for a particular feature. Check the actual joining route rather than assuming all calls work the same way.
How video calling works
At a high level, the service captures camera and microphone input, encodes the media, sends it across a network, and plays the received media on the other device. Codecs encode and decode audio and video so the service can transmit them in a usable format.
Browser calling can use WebRTC for real-time media exchange. Connection setup involves exchanging information about how the participants can communicate. MDN explains WebRTC signaling and video calling and the codecs used by WebRTC. A complete calling service also handles invitations, access, and its own feature set.
Quality depends on more than the internet speed advertised by your provider. Network delay, interrupted delivery, device performance, lighting, microphone placement, and the chosen service can all affect the experience. If video becomes unstable, turning the camera off temporarily may help you keep the conversation going while you investigate.
How to start or join a video call
- Choose the service the participants can access and create a call or meeting using its controls.
- Send the intended participants the invitation through your usual channel.
- Open the invitation using a supported device and app or browser.
- Review camera and microphone permissions and select the intended input devices.
- Use the preview or test controls, when available, to check your picture and sound.
- Join, confirm that people can hear each other, and explain the purpose of the call.
- Use screen sharing only when it helps the task, selecting the relevant window or tab.
- End with agreed next actions and close the session.
If the microphone is silent, follow our device-specific microphone guide. For a broader investigation, use the technical troubleshooting checklist.
When is a video call useful for customer support?
A call can help when the customer and agent need to clarify a sequence together, confirm the current state, or try a next step with immediate feedback. Camera video may help explain a physical setup; screen sharing may be more useful for an application problem.
For example, a customer cannot complete a software setup. The agent asks them to share the relevant window, observes where the process stops, and explains one next action. They check the result together and record the remaining work in the support case. This is an illustrative workflow, not a guaranteed resolution time.
A live call is not always the best format. A short recording can be easier when schedules do not overlap or the problem needs engineering review. Written steps remain useful for searching, handoffs, and checking what was actually tested.
Screendesk supports customer-recording and browser-call workflows through integrations such as Zendesk and Intercom. Choose the format that gives the support team the missing context and keeps a clear next action in the case.
Privacy, permissions, and recording
Before sharing your screen, close unrelated windows and choose the smallest useful sharing scope. Tell participants if the call will be recorded, what the recording is for, and who will have access. Follow your organization’s requirements for recording and retention.
Do not assume every service or call mode is end-to-end encrypted. Encryption, access controls, and recording behavior differ. For example, Zoom documents a separate end-to-end encryption setting with feature limitations. Check the provider’s documentation for the mode you actually use.
If you need a recording, confirm the service’s recording permissions and settings before the call. Afterward, check that the file plays correctly and that sharing access matches the intended audience.
Common video-call problems
| Symptom | First checks |
|---|---|
| No sound from your microphone | Check mute, microphone permission, and the selected input; test a short recording. |
| No camera picture | Check camera permission, the selected device, and any physical privacy cover. |
| Echo or feedback | Check whether multiple nearby devices joined with audio; try headphones. |
| Delayed or frozen video | Check connection stability and competing uploads; test audio-only while investigating. |
| Cannot join | Check the invitation, required account or passcode, supported client, and any host admission step. |
Frequently asked questions
Is video calling free?
Some services offer free calling within defined limits; others require a paid plan. Check call duration, participant limits, required features, and any mobile-data charges.
Can I make a video call without downloading an app?
Some services support browser joining. Follow the invitation and check the browser and device requirements. Browser access does not necessarily include every feature available in an app.
How much data does a video call use?
Usage varies with resolution, participants, service, and call length. Check provider guidance or your device’s measured usage rather than relying on one universal megabytes-per-hour figure.
Can the other person control my screen?
Ordinary screen sharing shows your selected content. Remote control is a separate capability with separate permissions where a service offers it. Do not assume sharing a screen enables control.
Is a video call automatically recorded?
Recording behavior depends on the service, host configuration, and permissions. Check the call’s recording status and ask the host if you are unsure.
