From what I see on the video, you're doing nothing like the chord diagram with your fingers, which won't help. I don't know what you're plugged into, but it doesn't sound right, either. We're going to have to go back a few steps to find out how to help you. First things first, then. could you do a video, playing one string at a time, starting with the low 'E', then the 'A', the 'D', the 'G', 'B' and high 'E'. No fingers required on the fingerboard, just the open strings, one after the other. Let each one ring, then damp it, and play the next string. With this simple check, we can hear if the guitar is in tune, and what the amp sounds like. Can you do that for us, please..? Over to you ...
Douglas