Scripts that were used to create this one
(Thanks to Leadra https://greasyfork.org/users/4839-leadra for informing me.)

YouTube Better Player(YT音量滾輪_嵌入可)
https://greasyfork.org/scripts/420723

YouTube Volume Mouse Controller
https://greasyfork.org/scripts/376002

YT音量滾輪++(包含縱向黑底+控制列、首頁縮圖、shorts可)
https://greasyfork.org/scripts/376155

YouTube Volume and Time Mouse Controlled
https://greasyfork.org/zh-TW/scripts/493044

YouTube Mousemove Volume Control
https://greasyfork.org/zh-TW/scripts/448821

I tried to find a script like this but couldn't find anything like it anywhere, so I decided to make it myself (using ChatGPT because I can't code) and I wanted to upload it if someone else wanted to use it.

One unresolved issue:

The YouTube context menu keeps showing after letting go of right click even though I tried several times with different prompts to make it work it just kept showing up so I gave up lol (but if you can find a way to block that let me know by leaving a comment.)