Gen gen pressing is a daring style. See how in the example Matip was pressing high up? In tactical view of gen gen pressing style there is nothing wrong in that because beside the risk, there is reward in winning the ball higher up the pitch. The core principle of gen gen pressing.
Facing rushing counter attack is common for teams using high press strategy. That is why the last line defenders are ultimately important. No need to talk about VVD, and why Liverpool in their position back then willingly forking out the world record fee for VVD to complete the team. Now look at our world record CB in easier situation. Even before we talk about high press, he was terrible in a high line, under Ole and previously at Leicester under Rodgers. He is neither good as a destroyer (the high pressing CB), nor as a sweeper/ last line defender. For what we paid, it's a total failure to transit into modern style that requires a high line, and front foot defending style. Him replacing Smalling is propress wise side way moving. Ironically Smalling at Maguire current age would be much better suited for this kind of defending especially in destroyer role. Current Maguire passing is not that great so there is not much trade off. Smalling is safer passer than current Maguire even.
When a player pressing, he is facing forward. The ones behind him, as part of the system should (trained) position to eliminate "unnatural" free space. See how VVD in the example clip was also higher up in the pitch. The "natural" free space after other players press is one thing, the extra free space created by the last line defender being a pussy backing away/static standing around tactical dumb founds another matter.
In this sequence, we're talking about, if the defensive line was kept higher, it would make the opposition attackers stay further away from goal if he wanted to stay on side: too many extra free space. That margin at this level would be enough for defensive recovery. Varane at last second recovered and got even with the assister. If the last line defenders had (should have) bought Varane a yard or two with the right tactical decision, it would have been a completely different story. Even as it was, Boro player found it hard to control that ball, and had to hand ball it. Making it harder for him and the probability of him fecking up exponentially increases for certain.