I like the bright color scheme of this thumbnail, it's very eye-catching
You've got your logo, and the color scheme continues with your other thumbnails, so I think that gives you a good brand. Although, is that logo personally drawn or?
Anyways, without context, I don't know what this thumbnail is trying to tell me. I know that it's asking me if I can't hear the TV, but it doesn't provide a follow-up. Why should I click on this?
I checked the video and saw that it has a lot to do with electronics you gotta buy, so perhaps add those into the thumbnail as well? I didn't expect to have to buy a speaker and a Bluetooth headphone. I thought it might've just been a remedy for hard of hearing... if that makes any sense.
I found a somewhat similar video with this thumbnail:
View attachment 3022
I feel like the thumbnail here showcases the problem, it gives you a follow-up, and it shows the item they used. Albeit, both solutions (from this video and yours) are different.