If you're losing subscribers...it's you. Always start there...what can I improve, change, upgrade etc. Just off the top...I'd suggest 1. A video welcoming non-subscribers. I checked out your channel...but didn't really know what you do, or why I should be there. 2. I'd suggest you don't post often enough. 3. No matter how great the music is, it's nothing if it's not discoverable. I want an hour of meditation music, YouTube won't let you compete with the bastions of your niche--it's also a lot to ask of your channel to find or hold people when there are other places--again this isn't about quality. 4. Your channel is starving for your attention.
Suggestions? It's all hard work....
1. Use your social network to find friends or associates willing to spin your content.
2. Market how the iconic channels do, to the best of your ability and budget.
3. Experiment...it's not good enough to hang content--you have to drive people to your channel. Maybe call 5 yoga studios or meditation-focused businesses and simply ask them to try your videos. --
4. If they say yes, then ask them what they experienced...
5. Optimize everything through TubeBuddy, you will learn and find where willing ears/eyes are at.
6. advertise. A few hundred dollars a month, done well, will help you learn to market better....and create the awareness your brand needs. I put this last on this list specifically because a LOT of the work needed to lift your channel up is, on you...I wouldn't advise advertising until you know who you are targeting...and are prepared to receive them in your shop.
I hope that helps. Keep it up...I'm going to go meditate now.