I'm not aware of these things being well documented but I'd appreciate a link.
And I'm just trying to say what I've observed. I'm explicitly saying that this is black box probing. I'm not sure these are the causal variables making the changes but they seem to correlate. I've said there are other effects than VPN too, like clearing cache and changing browsers. It is definitely a weird feeling to open a page in multiple browsers and see different prices. You're right, I do not know what's going on but I'm not lying nor am I alone in seeing these things.
My understanding is that on most airlines, for a given route and fare class, you should expect a consistent price. Fare class is determined by stock available and a few extra inputs like trip length.
I'm not quite sure what you wanted me to take from that. First off, it's the best case where there's a high competition. I mean it is a YouTube video and it starts by stating how people spend their entire lives figuring out pricing, so of course it's not going to talk about everything they do in the fine grained nuance. Second, there's another name for price matching: collusion. It's usually indicative of a unfair market and he goes on a tangent for this. Then the next section he called the previous section "micro". Clearly he's not talking about dynamic pricing on a sub day interval.
It was a nice video and I learned some things but I'm not sure how its contents are relevant to the conversation. Doesn't prove or disprove anything. Well... it does demonstrate some ways airlines are anti-competitive but that's not what's being talked about here
And I'm just trying to say what I've observed. I'm explicitly saying that this is black box probing. I'm not sure these are the causal variables making the changes but they seem to correlate. I've said there are other effects than VPN too, like clearing cache and changing browsers. It is definitely a weird feeling to open a page in multiple browsers and see different prices. You're right, I do not know what's going on but I'm not lying nor am I alone in seeing these things.