Can I use WiFi to receive video/audio sign and mobile data to connect to the internet at the same time?

Hi, everyone. I have a question about an IoT device. Can I connect my IoT device to a mobile phone using WIFI and then connect the mobile phone with the internet through 4G mobile data? My IoT device will send video and audio signals to the phone, and an app will communicate with the internet using 4G mobile data. Therefore, effectively the IoT device is communicating with the internet through the mobile app. In the communication between the IoT device and the mobile phone. The IoT device acts as a WIFI hotspot so the mobile phone can connect to it.