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It’s a cheap capture card, but considering the characteristics of relay platforms such as Zoom anyway, there is a limit to the image quality transmitted, so it’s clear enough to reach that limit. The image quality of the camera of the smartphone (LG G5) is also clear enough. In particular, even with digital zoom, the resolution of the camera module is much better than that of the capture card and relay platform, so there is no degradation in image quality with two to three times zoom. It is great that the same is true when using the front camera as well as the rear. The relay (filming) app of the smartphone (LG G5) used a free app called “Open Camera.” (It’s a normal camera app, so you can just record it, and there’s no problem with broadcasting, regardless of whether you record it or not.) If you touch it well, you can output a clean HDMI that doesn’t have any superimpose interfaces such as various buttons or numbers. (The interface will also be displayed when you touch a finger, but it disappears after 5 seconds without manipulation) Also, if you lower the exposure (2.8), the dynamic range will be widened (-1), so you can see both the background and characters well even when using a whiteboard or electronic board in the classroom, and you can transmit high-quality images as well as a proper camera.Unfortunately, the sound is not transmitted. You have to use the microphone separately.—What are the relative advantages of using a smartphone as a camera? VS Webcam: Using the front camera of the smartphone enables preview of the screen currently being filmed. Lecturers can feel more secure when giving lectures on the pulpit. In the case of single-person broadcasts, it is also easier to adjust the composition. The digital zoom function allows proper camera position and angle of view adjustment, and the image quality is good enough even at this time. The image quality, especially the dynamic range, is good. VS Camcorder: Initial purchase cost is much lower if you buy a new one. The volume and weight of the equipment are much less. If you have never operated a camcorder, it is much easier to operate a smartphone.—240104 Adding contentThere are two types of TypeC HDMI hubs at Cheonwon Mart, one of which is the one in the picture above and the other one with VGA (=RGB=D-SUB). Among them, I recommend buying one with VGA. Not because I need VGA output (I bought it at the right price in the screenshot of the purchase, but the same product is currently on the Cheonwon Mart list for around $3), but it has Mcpro24fps’ clean HDMI output function on the LG G5 (Mcpro24fps is the name of a very good paid camera app). Strangely, it works well with VGA, and not with only HDMI. Of course, it has nothing to do with the presence or absence of a VGA terminal, and it must be the difference in the internal chipset used. However, consumers cannot separate it and buy it, so you can buy one with VGA based on Cheonwon Mart’s product. Both worked well on LG V50/s. Meanwhile, both hubs are charging (OTG) while in use.The USB (2.0) HDMI capture card is also available for $2 at AliExpress. The capture card is 1080P at the most for Zoom or OBS, so it doesn’t matter at all. You can check that the screen of your smartphone is well recognized on Zoom.As various non-face-to-face events are held after Covid, the demand for relay cameras is also increasing. In the meantime, there is a way to use a smartphone as a camera, so let’s take a look at the precautions at this time. Supplies: LG G5, Hub with HDMI+PD, USB Capture Card