The other day I was watching a YouTube vid about Caesar's aborted attempt to take Britain in 54BC. The narrator said before the expedition there were people in Rome/Greece who thought Britain might be the edge of an entire continent, is that true?

by grapp

They'd have to go waaaaay further out into the Atlantic to find a new continent

EDIT: https://m.youtube.com/watch?v=LOCBWh5Iwm4&feature=youtu.be

SuperNerdRage

As a follow up, what do historians of this board think of this channel (if you've seen any of it)?

Edit: I mean in regards to historical accuracy.