Comment by miyuru

1 day ago

google the domains and you will find subdomains that point to cachefly.

    hiwd.kxulsrwcq.com is pointing to vdd.cachefly.net 

I am not sure, but my guess is they might be used by some kind of a streaming service.

Most likely something like an ad service to prevent their content being caught by domain blocklists. That would be similar to how a lot of websites started using randomized strings for attributes like id and class so that users couldn't block page elements based on CSS selectors.