Haven't been around to watch one of these in ages...but at least I laughed a bit watching this. xD
As for IG "copying" Valve...I didn't know that kind of stuff was "copyrighted" to Valve? Sure it's similar but that doesn't mean it can't be used again.
It's at least good to know they moved away from R2's "borrowing" of the two weapon, regenerating health thing but at least the regenerating health thing made sense in game. Going back to the original is MUCH better than keeping that. To be honest though, Yahtzee (dunno if you actually are reading these still since it's kinda late for my update haha), Ratchet and Clank had the same things that are in Resistance, gameplay wise...maybe the story was "borrowed from" a BIT but as for the multiple weapons, aliens, and health packs (of sorts), they were in Insomniac Games "previous" series as well. So if anything they used their OWN ideas for how the gameplay works at least.
If you're going to go back and play one of the games in the series, play the original Resistance, and just wikipedia plot stuff for Resistance 2...just not as fun as the rest xD