As soon as i clicked your channel (https://www.youtube.com/channel/UCYqXw7k4QXgvjUROEN38DBA/) I noticed one big thing that doesn't stick out - Your thumbnails for your videos. You have really plain images, its pretty much just a colour. I would recommend getting some more enticing thumbnails because if i saw your thumbnails i probably wouldn't click the video as it doesn't draw me in. Get bigger text, a few minecraft images and throw it all together.
Here are your tags for your most recent MC vid:
"Minecraft (Award-Winning Work), Let's Play, Pig (Animal), Play (EP), Mojang (Video Game Developer), Multiplayer Online Battle Arena (Video Game Genre), Video Game (Industry), IGN (Website), GameSpot (Award-Winning Work), GameCube (Video Game Platform), Commentary (Magazine), online, Online And Offline (Media Genre), Kevin, GameFAQs (Website), Game Boy Advance (Video Game Platform), Zelda, Legend, Multiplayer Video Game (Website Category)"
They aren't the best tags, create tags similar to your content. Zelda isn't an appropriate tag as if someone if searching zelda then comes across minecraft they might not come back and watch again. Remove all the tags and re start tagging them, have tags like "Minecraft, Building, House, Cow killing, How to, Build house, Minecraft PC, Finding, diamonds, wood house" and add a few more tags they are literally just examples, more relevant tags = more accurate results = viewer happiness.
Your Youtube little image is great (the logo), maybe work on the banner because i can't actually see any of it, it looks too big for the actual banner.
Pack the start of description with keywords but keep it relevant so what you do in that episode so maybe something such as "Hey people! Back again with another Minecraft PC Lets play, today we *Brief description of what you do*" try adding title in with it so your most recent one "NO PIGS" you could put something like "I had a hard time and found NO PIGS", write it around 3-5 sentences long just enough so it don't go into the "Show more" section.
Maybe add some music into your videos, and finally the quality is good but try going full screen and not like the box screen. Hope it helps!