There was more going on than expressed in the video about the lifting through Eau Rouge.
Lap 3 to 12 (with the exception of lap 11) was flat.
Now I selected the 3 closest laps (where I presume was normal running with no DRS - I would have to go back and check the lap numbers I made on the Spa thread when I compared the speeds of Max, Lewis and Charles) and also the 3 laps where he was lifting through Eau Rouge.
You can see that by lifting it was around .275 to .300 slower by lifting, that's just to himself. Of course there are some averages in there, but I feel 3 laps where the car was in clear air lifting and 3 laps flat out in clear air is a pretty fair comparison to be able to make. I dont have the fancy scripts to average out stuff so just make of the F1-tempo plots as you may.
Through the same laps Perez was dropping around .200 on average(ish) when he was lifting compared to Max going flat out. There or there abouts ties in with the above figures with it costing Max the .275-300 in time by lifting. (taking note that the .200 is about in the middle of the laps selected, so there was higher and lower than the average)
Id dare bet lifting each time though eau rouge was around .3-.5 worth of laptime just to himself. So on top of dropping half a second to Hamilton and Charles, he was also dropping .300 to .500 just to himself alone in the same stints.
Mess with the Bull - you get the horns.