I’m not CT, a coach or a professional. But the Snatch-grip High Pull is one of my favorite movements that I have been doing for a while. So take my 2 cents with a grain of salt.
From what I see you are not connecting the power generated from your hips with the actual pull. You could just stand still and still accomplish what you are already doing. Which is just a shoulder raise with some body English. Focus on generating power from your hips like you would for a power clean (Mark Rippetoe has a couple good YouTube videos on the power clean). While in motion pull the bar up. Keep your elbows up. Pull up violently, then let the bar go back down. Don’t try to hold it for any amount of time. It’s a power movement. Power from the hips, pull that sumbitch fast then let momentum take care of the rest. Hopefully that helps bro. Keep at it. Work your way up. At 225lbs a high pull will have you yoked like a beast. But start with just the bar and work you way up slower than you think you should