Record Nintendo Switch gameplay in portable mode?

Is there a way to record video on Nintendo Switch gameplay when playing in handheld mode? So far I only know about the built-in function, in which the videos are only allowed to be short, or stationary via the television with a video capture card / box. Is there also something for portable mode? Would like to comfortably record a gameplay in the handheld. Does anyone have a solution?

I think you would have to combine 2 things, on the one hand this:

https://www.ebay.de/...2042213498

and then you have to connect it like this:

that's how I would do it, Hald is quite a tangle of cables.