No sub4sub at all,not even buying subs, I posted a video a few years back and people loved it and it got 1Million views and a metric butt ton of comments and likes etc, posted videos like it since and they have only got a fraction of the views. Ever since about september of last year my channel has just died.. its almost like it just doesnt appear anywhere
So here's my thoughts on YouTube success. I'm not an expert, but my channel only having 59 subscribers seems to be doing significantly better than yours at the moment. I'm going to address the five elements that I think make for a successful YouTube channel.
Content Relevancy, Content Quality, Supply and Demand, Social Media Presence, and Luck.
When I analyze my own channel's success (I've been doing the YouTube thing for about a month now and I would consider what I've accomplished in that time to be a success) I look at these five elements.
Content Relevancy and Supply and Demand have a direct role on organic traffic to your channel. Social Media Presence and Luck have a direct role on inorganic traffic. Video quality increases the odds that your video will be shared. Organic views are views that are gained by searching on YouTube / Google / Suggested Videos (essentially, any part of YouTube that your video may pop up in.) Social Media Presence is views from you sharing your videos on your various social media platforms. What I consider luck (this happened to me once) is a big tuber commenting on your video, and their subscribers heading over to your channel.
I believe the formula changes based on what kind of content you're putting out there. From glancing at your channel it appears as though you're putting out video game content. The market is currently flooded with this content, therefore the supply is much higher in comparison to the demand. I noticed too you have a guide for the new Pokemon game that was uploaded about a month ago. The game has been out for quite some time now, some people have had early access to it and those people are usually the ones who are also uploading videos and guides (so those guides likely already exist.) I would argue your content has lost its relevancy (or at least the relevancy you would want when first uploading the video.)
I have a friend with a YouTube channel of roughly 20,000 subscribers. He has early access to Pokemon cards before they're sold to the public and he unboxes them and gets a buttload of views. At the time of his upload the supply is low in comparison to the demand. His other videos barely break 5k views.
If your video quality is good you should continue to grow with views on average. Having one video hit a million views I would not consider to be your average video. Look at the trend for your normal videos, the ones that didn't do that and think about those five elements.