Thats Zanx, (Big bloke with the shaved head in the clip up there) a good mate of mine from a few years back on Visordown (before Ben sold it)
He was nothing to do with Almax, just lived in Ilford, with no garage and was fed up with scrotes nicking motorbikes, so came up with a load of alternative protection.
His most famous was the "Bucket-o-crete" ground anchor
He then found Almax and started championing them against Bigger named "sold secure" locks...... to my knowledge there is still nothing better than an Almax lock and chain combination.
They do a small version for push bike use but its still very heavy.
As for d-locks....... bottle jack, pipe freeze spray and a BFO Hammer will sadly see most of them fail.
Use the smallest one, and lock it tight (so they cant get a jack in)
Or the tool of choice appears to be Li-ion cordless grinder with a 1mm slitting disc...... not much is going to withstand that for long.
In the M-Bike world, sadly unless its locked to something immovable, then its likely to end up lifted by 2 blokes into a refrigerated van, still locked and alarm going off.
Once the doors are shut you can`t hear the alarm and they can disable the security later in a workshop at their leisure