not a bad jab. Sometimes when you throw your combo your right hand is down.

Also, as someone said, it's almost spot on for muay thai. Bring your jab hand up and rear hand down. It's too high. Also tuch your left elbow WAAAAY in. You're completely exposing your ribs. That's also why being too square is bad. Turn your laft hand inwards and rest it on your cheek.

it's also tough to grade your footwork. Jab and stride, then drag your back foot.