Re: Lee Comeaux - becoming aware of the role of how the right arm tucks, joins the hips or just generally works in the swing would account for a good deal of improved path and swing speed especially if you were using only arm speed before. But I would really be understating the importance of further researching this position used with rotation and committing to and keeping axis tilt while holding lag. If you will take your hands no further than right shoulder height on the back swing it will be easier to get a grasp and make work this turn with late (for you) release.
Part of what Lee is generating is 'flash speed'. There are so many ways to hit the ball and as long as you are comfortable and consistent then that's that.
But my view is that you're a big guy and 260 carry should be no problem for you 24/7
IF you are using your body well. What you are seeking is effortless power with consistency. And again if it's working then that's your swing and no one should tell you different.
Especially someone who is suggesting that this imaginary creature called effortless power with consistency exists. Just because I want you to work on resisting the urge to swing the arms and instead rotate the tucked right elbow, straight left arm and hinged wrists slowly and comfortably around your downswing axis tilt until they are almost on top of the ball before letting things go does not guarantee results. This is your journey and you have to consider the source while trusting your instincts. fwiw - practicing with a 3 or 4 iron or a hybrid can allow you to feel the differences easier because there is often some 'bash factor' involved in swinging a driver - it just happens.
btw- As someone who used to hit wicked hard with their hands for years and almost permanently damaged the tendons in my wrists I can tell you that I now leave the hands out of it and things are better and simpler. Both Martin & Lee were born with Popeye DNA. I understand you are working out so if you're going to go down this path I would look into how to properly develop hand arm strength. And easy does it with warming up the tendons and nothing heavy for you because golf is already putting a demand on them & recovery time is critical. More maintenance than building.
For now, no matter what technique you are training, grip down on the driver for more consistent results until whatever you are working in is grooved.
As far as the video goes I perceived what I saw in the other - a sense of making a full swing work quickly 'with' the right side instead of working the right side 'under & around'. That said you're playing better than 80% of the golfing public.
(Below are some stills of Lee, even he has his hands & shaft leading the ball, if only a bit)