I was watching this video and was pretty well informed about the beaches of Omaha. However, I can’t find any other information on how the defenses set up.
Was it all the same across all beach front, or did the different beaches have their own types of defense? And where can I find more info?
You can find excellent detail on this in the Battleground Europe series of books that cover Sword, Gold and Juno beaches.
There were extensive fortifications covering all the beaches. Beachfront buildings and villages had their populations removed and were fortified. The beaches themselves were lined with obstacles of steel, and poles with land mines attached, each designed to tear the bottom out of landing craft. Further inland were concrete artillery emplacements, smaller 'Tobruks' or concrete pill boxes with machines duns, mortars or the turrets of obsolete tanks, and prepared trenches.
However, the Germans lacked manpower and only had light forces holding the beach defenses. They could not occupy all their positions, and knew the beachfront defences would face the full force of bombing and naval guns: they needed to also hold troops inland to respond to the landing, and deceiving the Germans to prevent the use of such forces was a key Allied objective (and one most successfully executed).
Large defensive positions faced by the British and Canadians included the Longues sur Mer battery, the Merville Battery, and Port-en-Bressin. There were dozens of other concrete emplacements. While the largest were targheted with specific attacks, it was some of the smaller ones that proved most troublesome. A gun emplacement at le Hamel, armed only with an obsolete field gun, destroyed a whole series of British tanks and engineer vehicles as they came ashore, it's awkward positioning preventing its destruction by supporting naval units.
As well as the major operations against the largest defensive positions, the British used many combat engineer vehicles designed specifically to destroy fortifications, overcome minefields, and cross anti-tank ditches. Royal Navy and Allied cruisers were specifically tasked with going close to shore after the landing craft had cleared out, to blast remaining fortifications.
The only German tanks that got into action against the beach landings were those of 21st Panzer Division, but their attack was misdirected and unsuccessful.