The site has a line of erotic video categories and some of these are available for free.
Cam4is an adult website that offers users adult entertainment features including female shows, male shows, couple shows and transgender shows.
The opening page shows that it is restricted for under aged visitors due to its heavily explicit content.
If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware.
If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.