towards the end he tests the 7870 at 900p. you originally said 20 to 30 more fps at 1080p on your 970.
He shows it for a few seconds and its running at 35-37fps which is much higher than most of the footage using the 7870 at 1080p and very reasonable performance, not a disaster.
I just rechecked my 970 testing as I did both 900p and 1080p and yes it's around 80fps 1080p and at 900p I get more in the 90s.
I guess the video now serves as a strangely worded mash up warning to not use MSAA/TXAA, and exceed video ram now.
Watching some more, PS4 is average 28fps. 7870 is averaging 33fps at 900p in the brief glimpse. Yes I know we don't have PS4 uncapped. XB1 dips even more so must be close and Unity on console was 20-30fps. Don't be silly and say PS4 is running this at 40-60fps.
Guess what, 7870 is about 20% better than a 7850. PS4 sits between a 7850 and 7870.
Using his own video for frame rates:
28fps + 20% is 33.6fps and PS4 is actually a bit better than a 7850 so we could say 10-15 but I'll be very generous and not even take that into account. What we have is bang on what you'd expect and to be honest I wasn't expecting it to that bang on and would not even be bothered if it took better hardware to match console.
I'm just using the video and the clips and setting he's used mind. The video is a mish mash of clips and points spliced together. Would be better if he showed a long test of PS4 and 7870 game play at 900p. I can't see any 7870 disaster, not anything really to concern anyone and my playthrough of Syndicate on my 970 is about what I'd expect and in-line in terms of fps looking at all the comparisons we've seen for the last two years which is 7850/70 about matching the PS4 and 970 running the game at 60-80fps, ie 2.25x the performance of PS4. We see this game after game.
Something a bit dodgy about running a 7870 1080p for most of the video. He seems to have an inflated view on the performance difference. It's about 15-20% and not going to handle 44% render cost, plus he knows the render cost as said in the video.