Crown
¯\_(ツ)_/¯
:O No way! I've been doing the description tags because I noticed others doing that! Thank you so much CrownAcademyEnglish! That surely saved me!
Could you please be more... Extensive? With niche terms? I'm not exactly sure on this :S
Well only you can know your keywords for your subject. I'm not a gamer. But I can give you an example - Let's say you were a channel doing photoshop tutorials.
I'm guessing the search term that most people would search for would be "photoshop tutorials" So you would think you should target that because google keyword tool tells you 100,000 people search that per month. Well the problem is that there are are 2.6 miliion results so a new channel would have very little chance of getting to the first page.
So you should target a search term with less results. example "photoshop tutorials text effects" has 440,000 results and even better, "photoshop tutorials glowing text effects" has 100,000 results. If you target that in your title and description, you'd have a fighting chance of getting to page 1. Sure that term won't pull in 100,000 searches per month like "Photoshop tutorials", but like I said, you are trying to get a 90% chance of getting a handful of clicks rather than 0% chance of getting thousands.
I like to call this strategy "go after the low hanging fruit"