I've just watched the Sheen speech as well. In all honesty, I saw nothing anti-English there. I saw someone explaining parts of the history of Wales. I saw a parallel with the overwhelming desire amongst educated Scots in the eighteenth century to become North Britons, so they could benefit from the promises of what Britishness would bring them. I saw someone, an actor admittedly, passionately saying what he thought was needed to move forward with Welshness. I'm not Welsh, it's not my place to say if he's right or wrong.
I also saw an explanation of what had been done to a conquered nation by a nation that saw itself as the last word in civilised society. Just the facts, not anti-Englishness. Perhaps those who consider it anti-English might want to comment on that?