what kind of action cameras are good for 1080p video onboard a high moving object(more than 800kph)?
The usual solution here, used by many pilots is actually the ubiquitous GoPro. They are robust, housings are built for most purposes and the tech is tried and tested, and compatible with everything. Solutions already exist for continuous power.

And the new GoPro 360 cameras will give you views in every direction - may or may not be useful for your use case.

There are budget versions/copies, but GoPro are the most robust I have used for high-g, high exposure uses.

If you are expecting extreme temperatures, then make sure your housing has the temperature control you need. That's what everyone does for mounting cameras on fast/high aircraft :-)