Some youtubers make effective use of a phone camera. Why not try that if you have a good one already.
my phone is an old Motorola V600. It cannot be used for filming, it's a very very old phone (bought in 1999). Yesterday I got impressed by the last iPhone 11. Not too bad with its 3 sensors. But it's expensive.
What sort of indoor stuff?
I'd like filming some video about the crazy hardware stuff I am making, but I'd also need something to show what's on the computer screen, and since I have planned a couple of new trips abroad, I'd also like filming something outdoor.
From what I observed on YouTube, it seems that filming some good videos which show what is on the computer's screen is not as easy as one imagines ...

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I got the chance to "try" the last "mirrorless APS-C" made by Sony when they presented the
Sony Alpha A6600 (1500 euro) in Copenaghen. I pretended to be a journalist and I tried a unit equipped with the APS-C optic "
Sony SEL1655 16-55mm F2.8 G" (1300 euro) and ........ the first impression was a WOWWWWWWW, because I was able to make a couple of shots (even of what was on my laptop screen) with a good sharpness at full aperture, even at the corners, hence I immediately fell in love with that, except filming with that camera + optic would cost an eye of my head.
1500 + Sony Alpha A6600
1300 = Sony SEL1655 16-55mm F2.8 G, APS-C optics
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2800
a cheaper option for the optics I have tried myself and found interesting
1500 + Sony Alpha A6600
0770 = Sony SEL1018 10-18 mm F4.0, APS-C optics
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2270
(unfortunately my current budget is ... 600 euro)
From What I have seen I think the camera is less important. Better to concentrate on good lighting and sound. And a tripod to hold the camera steady.
Yup. I agree.