You've already done the hardest part - publicly posting yourself performing.
Most people who speak and/or sing in public need to practice to have their delivery be more dynamic and lively - more natural sounding. So don't sweat the practice. Keep recording yourself and reviewing the recordings.
In our heads we may think we sound lively and dynamic, but in reality we usually come across much more mellow and reserved to those listening. So try a few vids just for yourself where you really cut loose and feel you are going over the top. Then watch it. You might be surpised to see how "normal" it looks as a viewer. If it is over the top, then you back off until you know what right amount feels like.
Consider moving your mouth more. Don't be afraid to open it wider and move your lips more when forming words, etc. If you watch trained singers or trained stage actors/actresses, they all move their mouths quite a bit. One exercise an instructor shared with me was to hold piece of hard candy (like those round pepermint things with stripes) in the back of your jaw (tall side between your teeth, not flat side between your teeth) with the molars, and then read or sing out loud. Really forces you to use and move your lips and tongue. The result is that you enunciate words more clearly and everything comes out a bit more clear and louder.
To help with volume, try laying on your back and practice breathing and singing. This makes you breath from your diaphram which then helps you project your voice more. Breathing from the diaphram helps to prevent the projection/volume from originating in your throat. This help you sing and talk louder, longer, and sound more natural.
Good luck!