I can't find this video at all.  Can you provide a link.

Reserving my judgement for the actual announcement.

I mean, it wouldn't be completely unreasonable. Even when it had PS2 parts in it, the PS3's emulator wasn't great. I expect many of the 'PS2 Classics' were slightly reworked for the PS3, so probably wouldn't work with the PS4's emulator. That said, if a game becomes available for the PS4's emulator and someone already owns the PS3 version, i don't think it's unreasonable to believe they should get it for free.

every PS3 can play every PS1 disc, here you have your answer if you want to cross between 2 generation. Why should nintendo put multiple cartridge slots into their system. We are talking about Discs here, stop damage controlling these companies

Swear to go if people who own the PS3 version have to buy it again, that would be pure bullshit. And that's not like Sony at all considering they're the ones who started Cross Buy.

Op still haven't said where It's from. I'll wait for official announcement first. This could be some random troll trying to force Sony into explaining details ahead of schedule.

Welp, if this is true, screw dat!
But I'll wait for an official announcement before entering rage mode. =P

I mean, weren't PS2 classics just remasters on the ps3?

Considering all the cross-play titles Sony does (who was really the pioneer in the console industry for buying one version for multiple consoles) I'll wait for an official announcement

Your comparisons seem odd. PS4 is technically able to read PS2 discs. WiiU is not able to read cartridges.