Hello @Marc Cortada ,
In order for your root domain to work with Azure CDN, you have create an alias record for your root domain and then onboard the root domain to Azure CDN endpoint as mentioned in the below article:
https://video2.skills-academy.com/en-us/azure/cdn/onboard-apex-domain
And for HTTP, you can elect to redirect HTTP traffic to HTTPS by creating a URL redirect rule with the Standard rules engine available for Azure CDN from Microsoft profiles as below:
https://video2.skills-academy.com/en-us/azure/cdn/cdn-storage-custom-domain-https#http-to-https-redirection
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