Yes this is a great catch! We are going working on a different video that highlights grips more…. But yes Eastern on the backhand slice is pretty common. Some are even continental. It can be more difficult to slice when you are semi-western.
You should show real time examples of your different drop shots. Slow motion and regular motion and have close-up and far away angles covering the whole court and your opponents hitting the ball to you and after your drops shots. I feel like you you could have done this video way better.
You should turn your hat around and use it to shield your eyes from the sun. That's why hats were invented. And then you wouldn't have to squint. You're welcome.