This bracket can fix the mini DVR to the hot shoe interface of the camera.
The file provides independent brackets and hot shoe clips, which are uploaded in STL and F3D formats respectively. You can flexibly use them according to the size and installation requirements of your camera; for example, I once tried a "inverted" version: first fix it with a 1/4-inch to 3/8-inch tripod screw
On my camera, I found that the clip slot is prone to interference when it comes into contact with the DVR, and it can even get stuck and be difficult to remove successfully. Since the strength of the print itself is limited and it's hard to withstand the impact of forcibly pulling it out, I chose to solder off the internal button. However, there might be a better solution.
The details of this mini DVR are as follows:
https://www.ebay.com/itm/286037516841?_skw=MINI+DVR&itmmeta=01JEY21X1BYM8HQVGBSVYH98N2&hash=item42992a2229:g:jKwAAOSw5gtm0oUE&itmprp=enc%3AAQAJAAAAwHoV3kP08IDx%2BKZ9MfhVJKn6Syvqzm4HWR3Y4yClrtmamW7