To work a swimbait over submerged grass beds, there are a few techniques you can try. First, make sure you have the right equipment. A medium-heavy to heavy rod with a length between 7'3" and 8' is recommended, paired with a high-speed reel with an 8:1 gear ratio. Use 50-pound test braided line for added strength and sensitivity.
Now, let's discuss the techniques. One approach is to swim the swimbait just above the grass, mimicking the movement of baitfish. Cast the swimbait past the grass bed and retrieve it at a steady pace, making sure to keep it just above the top of the grass. This technique is effective for covering a lot of water and triggering reaction strikes from bass hiding in the grass.
Another technique is to swim the swimbait through the grass itself. Instead of trying to avoid the grass, aim to plow the swimbait straight through the center of the grass bed. This can be done by using a weedless swimbait or by rigging a regular swimbait with a weedless hook. The goal is to imitate a baitfish moving through the grass, which can entice bass to strike.
It's important to note that the specific technique may vary depending on the type of grass and the conditions you're fishing in. The videos you mentioned provide some great insights into different approaches for fishing swimbaits in grass. Bryan Schmitt in the Bassmaster video talks about using a swim jig and a deep crankbait to target isolated clumps of grass. TacticalBassin also discusses using swim jigs to fish through the grass, aiming for the grass and allowing the bait to get hung up before ripping it free. Flukemaster emphasizes the importance of using strong equipment and straight braid when fishing swimbaits in heavy grass. Randy Blaukat in Intuitive Angling mentions using a swim jig to penetrate heavier cover in shallow vegetation.
Remember, always adapt your techniques based on the specific conditions you're fishing in and be prepared to experiment to find what works best for you.