Can't do much about that. Loketests always have horrible cam quality footage.
Also, didn't realize the site was linked in here.
GUILTY GEAR Xrd Portal Site
Looking at the system, it seems like ID is an actual mechanic this time around
Though my Japanese isn't exactly the best, from what I can make out of the clash system, it works like this:
Two attacks of equal strength hit, it's just a normal clash like any other.
If one attack is stronger than the other, the attack will blow back the weaker one (though, whether or not this leads to a combo opportunity will have to be confirmed in the loketests/final release).
If two particularly strong attack clash, you'll enter "Danger Time," during which the next attack will have "Super Counter" properties (likely similar to BB/P4A's Fatal Counter).
Of course, the general implication is that clashes will be more frequent. Whether or not we're talking Arcana Heart frequent is yet to be seen. I'm interested in seeing how it'll affect the meta (if at all).