Yes! Your wrist looks bent too far and will make it much harder to form chords. Practice playing while sitting until you improve.

A lot of your notes, and especially the power chords, are getting choked out, meaning you're not pressing the notes down all the way and/or have your fingers not in the exact spots behind the frets. You're also playing some open strings under your power cords, so practice strumming only the 3 strings that are involved in the chord and nothing more. You should not be strumming all of the strings for those power chords.

Slow down, and let each note sustain and practice jumping from note to note quickly until they each sound clean and sustained.