At the 3:30 minute mark - that drop serve is illegal - the ball cannot be thrown upwards with force. The server has the option of dropping the ball and hitting it after the bounce. The ball can be dropped from any height but cannot be thrown, tossed, or otherwise released with any added force to bounce it - from the USA pickleball rulebook

Who taught you that grip on your serve? Looks very awkward.. second time I've seen this in about a week! Maybe it was you in another video, and both on your team did the same serve! So, are all of you beginners? Nobody rallied here!