Just some notes regarding other periods from football in general and others more in particular to the period and match posted here.
In those days they didn't knew how to properly film a match, I once made a vid of a current match filmed as an old one and looked like a mess. I mean. where to position the camera, the lack of estability, the edition, etc. this cretes a bad vid that heavy influences our perception.
Also there will always be a mismatch in terms of FPS (frames per second), sometimes this vid are kind of ralentized, others accelerated.
So this stuff would always affect the way we can "witness" some matches from certain periods.
All in all, it doesn't take aside that there was more time on the ball, that players in general were prepared with older methods. That if you where a freak like Pele or Alfredo, you had even a bigger advantage against the rest. That depending on the period, but mostly compare to very current tendencies, players tend to risk the ball more, etc...a funny side of this aspect it's that we can read even on the 40's (and on every decade) articles complaining of the lack of soul and downfall of offensive football, in comparison with even recent older periods.
In the end there isn't a gap that an Oldie Great all timer couldn't adapt to current game (if he applies to it, that is another matter, some personalities just are what they are on any era/period).
The game on every period was different, it improves in general in terms of stamina, athletism, but also in some areas due to some tendencies can become less attractive, or better say more pragmatic than in other periods.
On the other hand this adaptation to the current game a Pele, Di Stefano can easily do, does not mean in a very silly way that they would run the 100 metres in 9 seconds, jump 5 metres or anything, they'll have similar traits, some even improved, but mostly they already had the talent and athletism to adapt in an easir way that the regular dud from their periods.
At the end of the day it's always a two side of a coin thing, being the star of star studded team it's great, like it's great to be one of the few ones in a more mediocre side, they are diff. secnarios, not one clearly harder or better, both are true good things.
There were harder, more criminal fouls, in other periods, but there was more time on the ball...players nowadays have less permission to repeat fouls and be reckless, but there is better teamwork, more aid from your mates when comes to defend in numbers or make tactical fouls constantly...some roles had to improve with no excuses, like keepers with the ball at their feet due to newer rules and a large etc...on every sport athletes tend to be faster, more durable, but since this is football, it changes the scenario, but not in the same sense a 100 metres competition does.
There are other aspects involve that doesn't make intrinsecally way better a modern player than older ones, nor viceversa. It' s more of a grey area, where also tendencies, philosophies of how to play the game come to play.
Also football is a contact sport, but it ain't Rugby where clearly the development of many current beasts affect the game more than it can happen in football where there is more room from more various skillsets and body types.
PD: Regarding the ball, I always find it funny that people tend to go to extremes with such things. yes current and modern balls are better, but for certain aspects, if go too far like the Jabulani it becomes uncontrolable like a birthday balloon (give me a 70's Tango all the way before this one for instance, I've played with both).
A heavier ball, it's always easier to dominate (hence futsal ones, smaller and heavier in order to control it easier ina way more constrain space to operate), but becomes harder to strike/header if gets extremely heavy and a rock like some of the very old ones. We tend to simplfy everything in these sorts of arguments about older peridos, modern ones, etc...nothing it's that simply and always is in some sort of greay area where sometimes two ideas, arguments, that might look opposite ones, actually live at the same time with each other without cancelling the other.