Hi Chris,
Great guitar playing- I am envious !
(I also know what it is like to live with an ailment that limits you from doing all the things you would like, so keep on doing what you are doing.)
Had a look at your video. This could be a number of factors:
1. Check your lighting- some scenes look a bit too bright and harsh to me. Your skin tones are washed out and faded in some areas. Is this the "digitized" look you are talking about?
2. What settings are you using for the camera? iAuto for everything? Also are you using avchd and then converting to 1080p MP4 (aka MPEG-4) in Power Director before uploading? What is your computer setup ?
Try turning off the "Fast video rendering technology" option before producing the final video. This disables the "Hardware video encoder." It will be a bit slower to render- your CPU is the main thing used to render the final video file. But I find the quality is much better. See if that helps you.
3. It could also be the conversion that Youtube does. I find it takes your original source video that is uploaded and re-compresses it and sometimes makes it look worse with loss of quality when played back online.
(I personally just use 720p- 1280 X 720/30p 6 Mbps since my files are large and my IP upload speed is a slow measly 1mb = 130KB/s. It crunches the video down more than MP4 resulting in a smaller file size but still has really good video quality when played back. Youtube does not seem to mess it up too much when it re-compresses it after upload.)
I use the Sony PJ710, your CX-190 is more than good enough for your videos I wouldn't spend any more cash on getting another type. Just keep experimenting with the software settings first.
Rob
PD 14 Ultimate Suite / Win10 Pro x64
1. Gigabyte Brix PRO / i7-4770R Intel Iris Pro 5200 / 16 GB / 1 TB SSD
2. Lenovo X230T / 8GB / Intel HD4000 + ViDock 4 Plus & ASUS Nvidia 660 Ti / Link: https://www.youtube.com/watch?v=ZIZw3GPwKMo&feature=youtu.be