Glad you are OK. From the video, it looks like although the road is only 1.5 lane wide, you were using most of it on your approach & planned corner line. Looks like there was plenty of room to pass the truck on the correct side. I’m not sure why you braked, but that is what put you down. A rear brake input would have tightened your line & the bike would have stayed upright. It’s a technique I have used often on turns just like that in the Alps & Pyrenees.
A bit more situational awareness would help, rather than the tunnel vision. I can’t tell from the video, but on those switchback type lanes, it’s often possible to see the lower road through the trees, to check for other vehicles, as you approach the corner.
I’m sure you will be more cautious in future. No harm done.
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