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5472 x (5472:2.5) x 24 x 14 x 0.4 / 8 =  192 MByte/s

216 in benchmark - 10 percent for overhead (est.) = 194.4 MByte

Close call.

7D2 has just 20.2 Megapixel and pixel-wise it comes to 5.472x3.648 pixels. Have fun glueing some additional pixels for 6k.

And that's without SD overclocking (no idea if it will work on 7D2).

Sounds like you need a PIR sensor, right?
Article in english wiki doen't exactly cover your issue. German one seems more like matching your use case.
https://de.wikipedia.org/wiki/Pyroelektrischer_Sensor
Try Deepl.com for translation.

And it sounds like you need some electronic geek's advice how to combine that with a trigger device intended to be used long term (commercial or not).

Click!

Would be easier to use an external trigger device with a sensor and detection logic.

https://wiki.magiclantern.fm/faq#how_do_i_record_stream_for_more_than_30_minutes

Found Kolari Vision's teardown of R5C. Yes, there is some work involved but battery replacement can be done by any sensible person.

https://kolarivision.com/canon-r5c-teardown/

The Canon EOS R5C was easy to disassemble, as it was structurally similar to the standard Canon R5 camera, except for having more screws, according to our camera technician Jared.

EDIT: I found no picture of R5C's mainboard rear to confirm it uses an MS614, too. I would be surprised if it is not there but no proof yet.

Bummer indeed: 200D, 850D and 7D2 require to have mainboard removed to access clock battery.

CR1220 is a thing of the past. I think 5D3 was among the last having those non-rechargeable clock batteries which where accessible via main battery door.
Canon switched to rechargeable LiON type named MS614 and manufactured by Sharp*. I haven't found any camera where those are soldered**. They come with a battery casing mainly consisting of white plastic. They started with battery holder soldered to mainboard and facing rear panel. Battery is accessible after removing back plate. Some newer models have holders facing to sensor. To replace clock battery you have to remove mainboard and therefore all cables attached. Models like 200D/250D are odd because battery is *not* part of mainboard but placed somewhere beyond.

If battery casing faces rear panel replacement should be easy. Just remove some tiny screws and remove rear panel with care. In most cameras there are two cables connecting rear panel. One FPC/FFC ("ribbon cable") with a board connector attached making plugging in/out a non-problem. Other connector is mostly a full-metall type dedicated for display connections. You will find them in laptops, too.
There are exceptions to the rule. Some cams (EOS M!) have an FPC/FFC direct plug to some header. It is a common mishap to damage this one and replacing it is a real PITA!

Now about R5:
This one has indeed its clock battery facing sensor. Requires cables connected to mainboard to be disconnected and there are a lot and handling them may not be advised for everyone. See Lensrental's teardown: https://www.lensrentals.com/blog/2020/09/taking-apart-the-canon-r5-mirrorless-camera/

Link to picture:
https://www.lensrentals.com/blog/media/2020/08/5T5A0077sml.jpg
Those three fingers at PCB's bottom? Battery and casing/holder are just at the 2nd finger.

Minor good news: Rear panel is connected by a single "ribbon" cable with board connector attached. You have to be extremely clumsy to rip this one apart.




* Other manufacturers switched to "Super-Caps" which is a fancy name for capacitors able to hold a very large charge. Those won't need any maintenance.
** There are MS614 varieties with solder tags welded to battery. Those won't fit!

1. Is there a chance to save some personal settings as a preset,

https://wiki.magiclantern.fm/camera_help#config_files -> Config Presets

2. Is there a fix for the focus peaking over HDMI? Mine works OK, on the camera's display, but when I connect an external monitor over HDMI, the focus peaking stops working, and shows as a glitchy horisontal stripe.

ATM ML focus peaking won't work via HDMI. You can try using Display tab/screen -> LV Digic Peaking
https://wiki.magiclantern.fm/camera_help#lv_digic_peaking
Some more sophisticated camera monitors (field monitors) come with focus peaking and more features. With a price tag ...

Issue sounds weird.
Rear buttons (also not functioning) are using a different connector/cable to mainboard than shutter. Both cables affected at the same time?

@anykill: You can try using a wired remote control to test shutter button function. 2.5 mm TRS plug.

This topic has been moved to General Chat.

https://www.magiclantern.fm/forum/index.php?topic=27054.0

Ehm ... not yet.
It should work but needs someone to work on it.

Learned something today! Andrew is right in some way but essentially it died before it began.

LOL!

But I will ask g3gg0 if he has an idea what Andrew Reid triggered to give this statement.

I don't get "resolution available now" bit. You most certainly have resolutions available requiring amounts of bandwidth not possible with 240 MHz.
Here is an incomplete list of cards compatible with highest oc mode:
https://wiki.magiclantern.fm/cards_240mhz

Join discord. Easier there for this kind of conversation.

Have fun chasing the unicorn!

No.
V60 and V90 are UHS-II cards. Look it up: There is no UHS-I card with this label and never can be because of rules made by SD Association.

UHS-II will run in UHS-I compatibility mode and may perform well @240 MHz (compared to fastests UHS-I cards). Or not.

Initial experiments with 280 MHz oc were not successful.

No support by ML project.
https://wiki.magiclantern.fm/faq#ml_won_t_work_with_my_sd-to-cf_adapter

About downgrade: Apollo7 found the door method some time ago. A1ex took a look into it and had a concern about possible hickup (possibly bricking the cam) and refined the routine. It is refered as "Method B" and we propagate this procedure only. Seen in installation instructions for 5D3.
No worries were reported so far. Hari made a video tutorial.
https://www.magiclantern.fm/forum/index.php?topic=24926.msg231788#msg231788

Introducing a third method ... may we rather not?

https://wiki.magiclantern.fm/faq#can_ml_suppress_black_columns_left_and_right_in_hdmi_streaming

To bust a pipe dream: ML project will never port Canon's C-LOG to any cam and will not support anyone trying to do so.
Same for other Canon features not included in Canon's firmware for a specific cam.

Examples:
Project was asked a lot to port AFMA to entry level cams. Project declined such requests.

ML enabled video (H.264/MOV) for 50D. Code was in firmware and ML (more or less) just created a menu item for it.
Same for electronic video zoom feature for M, 100D, 650D. 700D. Canon introduced feature with 600D and code was there for those cams, too.

ML project considers to be on Canon's good side and our intentions are to stay there.
Violating Canon's IP is not an option.

Full title is "Canon EOS 80D Needs Magic Lantern with EOSHD C-LOG For Video in 2023"
Has nothing to do with ML and there is no ML for 80D available for public use.