I finally managed to workaround the bug with the v01.08.00.10 that won't stream to YouTube and Facebook (in this thread I'm dealing with the YouTube issue, one at a time..)
I've created a video how to set things up. Basically instead of selecting streaming to YouTube, you select RTMP, you type YouTube's RTMP URL (create a new live stream and it will give you those details), and then you add / and the key.
Please note: during the video I'm using a program called scrcpy to copy my Android screen so you can see what I'm doing. You don't need that. Just follow my instructions, copy the RTMP server URL, the key, and you're good to go.
Also, since both OSMO Action and OSMO Pocket use the same chip, I guess (just guessing, I'm not a DJI employee/contractor) that we'll see streaming from OSMO Pocket soon ;)
Here's the link for the video: https://youtu.be/HZwc3N0XMsg