Your assertion is that the MSM endlessly lie, it's an assertion I dispute.
But either way it's certainly easier now to find information, there are an almost endless number of sources.
But each source has its own bias and agenda and it's harder to tell the difference between the good ones and the bad.
And it's much easier to find ones which pander to your* own biases and that just reinforces them
So, overall, I think we're in a much worse position for discerning truth than we ever have been. Not for nothing was "post-truth" declared the word of the year in 2016. Why do we have a modern flat earth society? How is that a thing? It's a combination of a distrust of the mainstream and the fact that misinformation can be spread very effectively via the web. A healthy distrust of the mainstream is to be encouraged, but EVERYTHING THEY SAY IS A LIE is obvious bullshit and it's that which results in "well if THEY say the earth is round then...".
Which is pretty much what David Mitchell is saying in that video, so yes I think it's relevant - but if you've read this you probably don't need to watch it as well.
(*I mean "one's", not you specifically, but that sounded pretentious)
EDIT: Just to add this is only going to get worse with AI and Deepfakes which are going to get increasingly hard to tell from reality. It's going to get harder and harder to know what is actually true.