There is no seal as it leaves the factory.
Not sure what you mean by this. I have seen your video and there is definitely a sealing (black rubber) on the hatch cover and probably also a sealing on the hull. But if these 2 sealing should work and do their job at the same time, there must be a perfect match between hull and hatch cover. IMHO this is not possible to achive with a rotomoulded hull.
So for everyone that says that their front hatch don't leak, that means (for me!) that 1 of the sealings is doing a good job.
First you must determine where the leak is. Probably the front hatch, but probably
is not enough.
Step two is to make a warranty claim via your dealer.
Because to correct this fault, if it is same I had, you have to make actions to both the hatch cover and the hull.
That will most certain void the warranty if you don't have some agrement with your dealer and/or Hobie.
and there is also a link to an other thread...
Don't accept ANY water inside the hull.