Our recommended MixCast setup is still one that uses a wired connection between camera and PC, but some experiments have been successful at using a wireless setup (you may want to ask our Community for more help if you want to replicate these setups:

• Using DroidCam or a similar app to send a camera feed from an Android device to the PC over wifi. Note: Latency can be a concern, specifically when it varies in duration due to network fluctuations.
• Using a wireless HDMI transmitter & receiver pair to send a DLSR/Camcorder/etc HDMI signal wirelessly to the PC's capture card. This works quite well in a capture card setup but the experience can vary based on the product used.