As the Coronavirus pandemic continues to force people to work from home, countless companies, universities or schools are now daily holding meetings using video conferencing services. With the rise in popularity of video conferencing for business meetings, remote education and virtual social gatherings, attackers have increased the number of both old and new attacks targeting video conferencing technologies and their users. A comparative analysis of the vulnerabilities of the most used video conferencing services is made in this research. The research methods used were analysis and synthesis. Using them recommendations were elaborated about how to increase communication security during online collaboration.