Stand-alone video capture device for Macbook air

Hi guys, I am researching how to record gaming from my MacBook Air (2019, 1,6GHZ). Tried OBS but the laptop does not have the power to game+record at the same time. I am not interested in live streaming, so I would like to know if there are any stand alone external devices, compatible with MacBook Air, that can do the recording externally on 1080p and 30Fps or better.

Even if the video gets stored in a usb would work for me, just want to know if a solution for MacBook air exists. Txs a lot for any help!

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