First, you've got a wealth of videos, which is good. Second, your thumbnails look great actually, so I wouldn't say that is the issue explicitly. From my review, you've got social media links, links to your website (which I also reviewed and can offer a "commend" to how much effort and work it seems you've put into this entire channel). You've really got extra sources of traffic beefed up (quite impressive if I can admit actually). Now to the knitty gritty nuts and bolts of this review.
1) I think since you have a channel about scary stories, your titles in your videos should be changed to incorporate or capture SPECIFICALLY what the height or climax of "scaryness" or "scary moment that happened" within each video is. From the looks, you give vague title descriptions to your audience like "Saint Patricks Day Horror Stories" but you don't tell specifically within the story that will be happening. I personally am inclined to believe that if you said "Scary clown abducts woman during St Patricks Day Parade | Scary Horror Story" that kind of descriptiveness in the title of the video might get more attraction and more views.
2) Subsequently to spilling the beans in greater detail as to the high points of what each scary story or video is about, you can sandwhich your keywords and tags of your video with SEO to improve the odds of new viewers finding your video, with keywords to match like "St patricks day parade abduction ; woman gets abducted st patricks day parage ; scary clown abducts woman during st patricks day parade; etc." > > > Because right now your keywords I've noticed have a lot to do with your channel "creepypasta ; new horror stories ; etc." RATHER than full descriptive context that matches the explicit title of the video (I will note: you do have keywords that match the title of your videos but there are keywords that are not matching to the title and the explicit description of the video so I think you could take time to review and update keywords and new title changes take place)
Overall I think the channel is good, I would just maybe tighten up the Video Titles to be more descriptive and also replace keywords to match more explicit with the high points you're revealing in your videos. Those would be my two suggestions. I know you post your videos on Facebook, but maybe branch out (if you don't already, because where else you share I don't know) - but maybe consider having someone post a few of your videos on subreddits on Reddit, or if you have a Reddit account posting a few of them there. You'll have to find appropriate communities but I'm sure there are some. I checked TubeBuddy and I only saw Facebook likes on one of your videos, so that is where this suggestion does come from. Reddit can also be another outlet or powerful tool.
One last thing to note (which may not be of use but I still feel compelled to mention) is that your video lengths are kind of all over the place. Some two hours, some twenty minutes. I would try and maybe find a consistent lenght time of videos so your audience knows what to expect and can develop a rhythm of your content and its duration basically. Some people may not enjoy the sporatic nature in length. (I'm not too sure but just an extra two cents)
Thanks for letting me review your channel! Have good success and I wish you a nice day!
