Betaflight OSD (on screen display) is integrated in BETAFPV F3 brushed flight controllers that shows important flight data on your FPV feed, such as battery voltage, current draw and much more. You can even use it as a menu to change your quad's PID, rates, filters and other settings.
Specification CPU: STM32F303CCT6 Six-Axis: MPU6000 ESC: All FETs are rated at 6.3A maximum. Support 6x15mm/7x20mm/8x20mm/8.5x20mm etc motors. Size: 26mm x 26mm,fully compatible with the Inductrix quad frame and mounting pattern Firmware version: BETAFLIGHTF3 3.1.7 OSD: Built-in BetaFlight OSD (STM32 controls OSD chip over SPI in DMA mode) Receiver: Frsky D8 potocol (SBUS) Power Cable: 55mm, with JST-PH 2.0 connector, AKA PowerWhoop connector Weight: 3.2g BETAFPV Support Freshdesk for BetaFlight OSD Setup: https://betafpv.freshdesk.com/support/solutions/articles/27000038661-betaflight-osd-setup
How would do an OSD with the AIO cameras? There is a video in and out on the fc itself, labeled CAM and VTX as show below. There should be a video in and out on the AIO camera, like BETAFPV H02 etc. If not, you would have to modify the camera for sure but it would totally be worth it. There is some examples. BETAFPV H02 Camera, FX806TC, VM275, FX805, Eachine XT02 etc aio camera vtx are available to use the OSD function.
Note: There is no current sensor on the FC boards. So the amperage value on the OSD is invalid.