[ehsankia]

Funnily enough, while it is true that there are some Youtube videos that show up above the rumble.com video for that query, all of them are from Rumble's own Youtube channel... So they are cannibalizing their own search queries :) And for some loose interpretation of "on", the results are indeed correct, those are dog videos "on" the rumble channel. As you mention, I don't see why it should be a string site: filter, if they're unhappy they can delete their Youtube channel.