# Secure and HD Video Calls

Although audio only calls are possible, it is preferable to conduct video calls between practitioners and consumers.

These can be carried out across the various client platforms, across supported operating systems.

The video streams are encrypted at source and decrypted at destination device. Sehacity administrators do not have access to packet data nor the encryption information for any call. This creates the security, which is of paramount importance to keep medical information private.

The video stream supports HD (high definition) resolution streaming, provided adequate bandwidth is maintained. The Janus and webRTC components automatically adjust resolution, should bandwidth conditions require such interventions, to continue call connection.&#x20;
