Use the tools in the thread referenced above to look in your query log, pihole.log, etc and determine where the advertisement is coming from. When you first do this, it can be tedious until you get the hang of it.
I prefer to tail the pihole.log in a separate window while I load the web page. Then I can see in real time all of the DNS queries and their replies.
When I reload that globo web page, here is what pops up in my pihole.log:
Oct 30 11:42:11 dnsmasq[8301]: query[A] www.google-analytics.com from 192.168.0.135
Oct 30 11:42:11 dnsmasq[8301]: /etc/pihole/gravity.list www.google-analytics.com is 0.0.0.0
Oct 30 11:42:11 dnsmasq[8301]: query[A] tag.navdmp.com from 192.168.0.135
Oct 30 11:42:11 dnsmasq[8301]: /etc/pihole/gravity.list tag.navdmp.com is 0.0.0.0
Oct 30 11:42:11 dnsmasq[8301]: query[A] cdn.krxd.net from 192.168.0.135
Oct 30 11:42:11 dnsmasq[8301]: /etc/pihole/gravity.list cdn.krxd.net is 0.0.0.0
Oct 30 11:42:12 dnsmasq[8301]: query[A] sb.scorecardresearch.com from 192.168.0.135
Oct 30 11:42:12 dnsmasq[8301]: /etc/pihole/gravity.list sb.scorecardresearch.com is 0.0.0.0
Oct 30 11:42:12 dnsmasq[8301]: query[A] imasdk.googleapis.com from 192.168.0.135
Oct 30 11:42:12 dnsmasq[8301]: /etc/pihole/gravity.list imasdk.googleapis.com is 0.0.0.0
Oct 30 11:42:12 dnsmasq[8301]: query[A] api.globovideos.com from 192.168.0.135
Oct 30 11:42:12 dnsmasq[8301]: forwarded api.globovideos.com to 127.0.0.1
Oct 30 11:42:12 dnsmasq[8301]: query[A] s.videos.globo.com from 192.168.0.135
Oct 30 11:42:12 dnsmasq[8301]: forwarded s.videos.globo.com to 127.0.0.1
Oct 30 11:42:13 dnsmasq[8301]: reply api.globovideos.com is 186.192.81.16
Oct 30 11:42:13 dnsmasq[8301]: reply s.videos.globo.com is <CNAME>
Oct 30 11:42:13 dnsmasq[8301]: reply s.glbimg.com is 186.192.91.5
Oct 30 11:42:13 dnsmasq[8301]: query[A] nqs.nice264.com from 192.168.0.135
Oct 30 11:42:13 dnsmasq[8301]: /etc/pihole/gravity.list nqs.nice264.com is 0.0.0.0
Oct 30 11:42:13 dnsmasq[8301]: query[A] api.sentry.globoi.com from 192.168.0.135
Oct 30 11:42:13 dnsmasq[8301]: forwarded api.sentry.globoi.com to 127.0.0.1
Oct 30 11:42:13 dnsmasq[8301]: reply api.sentry.globoi.com is 201.7.182.184