The following sites are whitelisted as image hosts:

digitaloceanspaces.com
facebook.com
intagram.com
m.youtube.com
nyc3.digitaloceanspaces.com
pinterest.com
sppeech
sppeech.nyc3.digitaloceanspaces.com
talkspar.com
twitter.com
uk.pinterest.com
x.com
youtu.be
youtube.com