Hi, I have installed peertube on my top domain, eg. mydomain.com. As I find ways to add CNAME record on Cloudflare. I was told that it can only be added to subdomains.
Post from Cloudflare.
This was confirmed by Wasabi Support,
Hence, your CNAME record should include your bucket name, such as « cdn.yourdomain.com » in the name field instead of « mydomain.com »,
Does anyone know how shall I set this up? My site is already running on the top domain, I don’t want to reinstalled. 
Resloved by reading this doc.