@XSplitHalf
The biggest issue with your channel is the name - XSplitHalf. Most streamers, if not all, know what XSplit is but allow me to clarify. XSplit is a piece of software developed by Splitmedia Labs that allows people to capture video and audio footage from your desktop or game window and stream it to services like Twitch, Hitbox and Livestream.
Can you see what the issue is? Your channel is named after a piece of copy written software. There is absolutely nothing stopping Splitmedia Labs or a representative on their behalf to take down your entire channel as it not only infringes on their copyright but can be misinterpreted as a representation of their brand/software. Going forward, seriously consider a different channel name that is far more ideal and evocative of you and your personality.
Ignoring that, let's go into detail about your brand art; it is absolutely inconsistent. You have a logo that you use for your avatar and in the thumbnails for 3 of your videos which looks completely different from your channel header. A key to good branding as I've mentioned several times in this thread is consistency. Think of a logo or typeface that you fancy and is representative of you and use it for everything, channel header, avatar, logo, logo sting, end card, thumbnails etc.
For thumbnails, the logo you currently have is lazily added in. There is no transparency; it is just slapped on, white background and all and looks incredibly cheap. The rest of the thumbnails are just wallpapers with hard to read text applied. Making good thumbnails is tied to your branding so again, think of a typeface or logo that is consistent with your brand and apply that to your thumbnails.
Content wise, you need to invest in a condenser microphone as the one you currently use is of low quality. For Let's Play content, vocals and voice over quality matters a hell of a lot more than gameplay footage. Save up some cash, buy a good microphone and mix the audio so it sounds perfect.
Good luck.
@nyah sky
Try and steer clear of copy written music. While using Beyonce tracks in your "Beyone Hair!" video makes perfect sense, you don't want record labels taking down your channel with a myriad of copyright strikes. There are several sites where you can license music such as Incompetech, Audio Jungle or Music Bed. You can even use the royalty free music YouTube itself provides but you run the risk of using tracks thousands, if not millions of people have heard already.
For your content, you'll need to invest in a shotgun microphone or a lavalier/lapel microphone to get some clearer, cleaner audio. You should also consider investing in a few lights to help your camera stay on focus and stop trying to automatically adjust with different lighting conditions. On the topic of focus, I get the idea behind auto focus but try to avoid it. Set it to manual, choose a distance that's right for you and stick with it. Again, it'll stop the camera from trying to auto adjust frequently which is distracting.
It's great that you have a logo and a font/typeface you use consistently but you definitely need to use it far more effectively. In the videos themselves the logo is blue but in your channel header it's black. Pick a colour that you enjoy and use it as a key element to your branding. You can also place the logo in the corners of your thumbnails and avatar to help viewers know the videos belong to you. With thumbnails, they need a bit of work as some of the text you use in unreadable. It's great they feature your face prominently as you are your brand but you need to balance that with readable text.
Good luck with your channel.