I wasn't able to retrieve the actual article content — both the text you pasted and a direct fetch of the URL returned only PC Gamer's site navigation and membership sign-up boilerplate, with no story text included.

Based on the headline alone, I can tell you the gist: PC Gamer argues that the leaked GTA 6 gameplay footage was likely captured on a PC build rather than a console, but cautions that this doesn't reveal much about the final console/PC release. However, I don't have the actual article body (technical reasoning, evidence, quotes, etc.), so I can't responsibly produce the two-paragraph summary and TLDR without risking making up details that aren't in the source.

If you can paste the full article text (or a working, non-paywalled copy), I'll summarise it properly.