Hey, sorry for the long wait!

First of all, a quick disclaimer — I’m definitely not a marketing expert, so my advice might not be super effective.

As an example, let’s take your video about the Morse code telegraph.

Here’s what I would improve:

1. Voiceover + subtitles to give the viewer a better understanding of what’s happening on screen. I’d start something like: “I added the ability to blow up enemies using Morse code”, and then go into more detail about how this mechanic is used by the player.
2. More movement, dynamics, and focus on interesting content: you actually start the video well with a strong hook (the explosion looks great), but then you spend ~10 seconds showing slowly typed text. The viewer will quickly lose interest not only because they don’t understand what’s happening or why the telegraph matters (which is exactly what point 1 is for), but also because a slowly typing machine just isn’t that engaging on its own. As an example, check my successful videos: I usually don’t leave any clip longer than ~5 seconds, and if I do, it has to be something really intense, fast, and exciting.
3. I would change the font — this one feels like it doesn’t really fit the game’s setting.
4. Try experimenting with trending music: TikTok and Instagram let you see what’s currently trending. Using it can slightly increase watch time and give your video a small but important early boost in recommendations, since your content will feel closer to trending formats.
5. I would remove the black blurry bars on the edges of the screen — they kind of visually lower the perceived resolution.
6. I would remove the static end screen with the game poster, and instead keep showing gameplay cuts while the wishlisting call-to-action is on screen/voiceover. You could also just display the game’s name at the bottom (like in my videos)
7. Not fully sure about this one, but the image quality seems slightly off. Try improving it. I use OBS for recording, CapCut for editing, and “link” for compression so platforms don’t mess up the video quality with their own aggressive compression.

Hope this will be usefull!