This clamp can help prevent the HDMI cable from coming loose while shooting and can help protect the port on your camera body.
This can be especially helpful when using an external recorder.
NOTE: This does not clamp directly onto most 3rd party HDMI cables
(1) HDMI Cable Clamp Attachment for Sony a7S III Half Cage
Color: Tilta Gray, Black, Tactical Gray
Materials: Aluminum-alloy, stainless steel