Reporting in with my experience. Not sure why other people have issues with the samsung cards. So YMMV. I have this one:
https://smile.amazon.com/Samsung-MicroSD-Adapter-MB-ME128GA-AM/dp/B06XWZWYVP
And was able to run it on my Yi4K+ @ 4K 30fps using the bitrate mod to record @ 150mbps for around 45 minutes straight breaking it up with 4GB files. It has not failed me yet (knock on wood) and I've recorded at least 20 Volleyball games ranging between 2.7K30 @ 100MBs and 4K30 @150mbps with an average length of 45 minutes. I record using an external battery attached to keep the heat down. I've ordered those U3/A1 sandisks and they work fine (4K30 and 2.7K60) but max size 64GB. I am sometimes worried about the fakes floating around on Amazon for Sandisks. Last sandisk U3/A2 I ordered, the card and packaging had different A ratings. Card had A2 but packaging had A1. The card speed was slower than my older Sandisk cards using a benchmark app. I read somewhere that the Green Samsung sd cards are sold by Amazon only and that they are the same as the red version. So I tried it out and it worked for me. Maybe this will help with your decision.
Bitrate is 135 MB, with YI color and medium sharpness. WB is on auto and same with ISO. Resolution is 4K with 60 PFS. It's exported in Premiere Pro with the youtube 4k setting and bitrate on 135MB. I'm not quite sure what causes it.
Link to some raw fotage: https://www.jottacloud.com/p/velocis/ad6de96db3964611b2445769feba38e0
Well indeed the solution of a homemade usb-c to analog video sounds a bit too complicated for me, since I'm not any good at electronics. Furthermore if it's only 480p, when the cam itself can shot 4k.
Interesting though that it's even there... I wonder why they did nothing with it.
EOS webcam utility is what I got to use my 600D through OBS. What would solve my problem would be THIS actually.
Anway thanks for your help!
This is the one i ordered from amazon which i can confirm works fine. SanDisk Extreme 64 GB microSDXC Memory Card + SD Adapter with A2 App Performance + Rescue Pro Deluxe, Up to 160 MB/s, Class 10, UHS-I, U3, V30 https://www.amazon.co.uk/dp/B07FCMBLV6/ref=cm_sw_r_other_apa_i_ZSc1Cb6E2KY2E
If there are cheaper sdcards that work though i would be interest to find out although i probably will still order the sandisk as i kniw for sure they work lol
I didn't realize that it was proprietary. I would have picked a spare up early on. I did find a (Canadian Amazon one that says in stock)[https://www.amazon.ca/YI-Type-Microphone-Convert-Cable/dp/B01CW4BHLW]
get one of these kits after you get the waterproof case: https://www.amazon.com/gp/product/B01HGMKQEE/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
You could find them for less than $10. I;'ve uses the floaty for snorkeling, I've used the chest mount as a 3rd hand, I've used the suction cup in the car with a gimbal, all that stuff is very useful and cheap.
You probably want to use a gimbal on the slopes to get steady video, unfortunately you can't use a waterproof case when using a gimbal. Probably not a good idea when it's snowing
To follow up I just got home and opened up the mic adapter. Plugged it in I have this microphone https://www.amazon.com/gp/product/B00ZR4N2CM/ref=oh_aui_search_detailpage?ie=UTF8&psc=1 and when I recorded it didn't import in as one channel. This is a good sign I think (I'm very limited in my knowledge. I will try to get access to an actual stereo mic soon and report back.
this was the one I bought fort $3.79 https://www.amazon.com/gp/product/B01LXXMTSY/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1
looks like it's out of stock. Only the circle one fits, the square one for the underwater housing is too big
I bought this https://www.amazon.com/gp/product/B01LXXMTSY/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1 for $3.79 but it's shipping from china and still didn't get here yet. If it's not great, I think I will try the Nerf Blaster Discs
Your card will work, as it is U3 rated and 64GB. Some people have tested 128GB microSD cards and said it works, but then upgraded their firmware and it stopped working, that they had to go back to a 64GB microSD card. I have a SanDisk Extreme 128GB card that will arrive tomorrow, so I can test it out and report back. This is the card I ordered: https://www.amazon.com/SanDisk-Extreme-microSDXC-Adapter-SDSQXVF-128G-GN6MA/dp/B01DYN4VPE
I know this ins't on their recommended list, but this works legit for me: https://www.amazon.com/Lexar-High-Performance-microSDXC-128GB-Adapter/dp/B012PLSIJ6/ref=sr_1_2?ie=UTF8&qid=1493280656&sr=8-2&keywords=lexar+128gb