To be honest, when I heard Warm Pouch say that Sessegnon will almost certainly be banned, and then watched the video, I thought "is that it?".
However, after watching it a good 10 times over I have to say that it looks far more like an intentional stamp. I may have been more unsure if it was just out of the blue, but the fact is that Sessegnon had a real reason to have intent due to Arteta's dive, and it's these moments of blind frustration which cause players to lash out like that and do stupid things.
I'm very tempted tp press that link you have at the bottom of your screen...