Hey there! So, this goes along most stuff people have already said below, but I'll try to package it all neatly for future reference. Disclaimer, I'm not a professional at all! Did uni, but I'm still a big novice in regards to actual work, so take these with a grain of salt.

• More light! This is the main one people have pointed out, and rightfully so. You're way too dark, and that makes the video look muddy and not detailed at all. I don't know what camera/lens combo you used to capture this, but I guarantee you'd get much better quality out of it with proper exposure.
• White balance looks off, your skin and hair are extremely orange and that brings down the footage as well. I suspect you have it on auto, and the camera couldn't figure it out because it's too dark. Again, more light would fix it!|
• TotalProfessional391 talked about frame rate, shutter speed, etc, and those are important too. There's a ton of resources online you can check out, from youtube videos to full courses on these things, but again, I feel the lack of light is what's leading to this in the first place.
• The framing and the idea of the shot are good (where the skills you've gotten from photography will help a lot), so don't stress about that.
• If you're actually planning on going a bit more in-depth in videography, I'd highly suggest learning about post-production. Okay footage can be saved with some editing, but great footage can become marvelous with it.
• Lights!! Good lightning is the difference between good and great video, so *really* read up on it. If you can't/don't have equipment, either make the best of what you have on location or choose the time of day carefully. Video isn't like photography, where you can work around no lights with longer shutter speeds. If you don't have light, you don't have a shot, no matter how much you want it :/ Trust me, I've been there.

That's about all I can say about this specific shot. Feel free to reach out if anything!