The FW-Solutions Recorder 1.0 is a budget option to record through your nightvision device. It offers 1080p and 30fps footage in a lightweight package, including an internal battery that will give you about 6h of continuous recording (charging via USB is also possible for longer missions).
It comes with a NylonPA12 ringmount to attach to your occular lense, a 32GB Micro-SD-Card is required for the operation.