If you're already watching that much video content, a tablet genuinely does make a difference. The jump from a phone screen to even a basic 10-inch tablet is pretty noticeable for things like Netflix and YouTube. Colors tend to look better, there's less eye strain when you're watching for hours, and you get way more screen real estate without holding something uncomfortably close to your face. Since you're doing this in bed specifically, you've got the perfect use case for it.
Cost-wise, you don't need anything fancy. A basic iPad or mid-range Android tablet will handle streaming just fine - no need to spend on the top models. The main thing to consider is whether you'll actually use it beyond videos. If it's *only* for bedside viewing, a tablet might gather dust eventually. But if you think you'll also use it for browsing, reading, or casual games, it becomes more worthwhile as an investment.
One practical tip: make sure whatever you get has decent speakers or budget in for a small Bluetooth speaker. Built-in tablet audio can be tinny for movies. Also think about how you'll mount it - a simple tablet stand or pillow wedge makes a huge difference when you're lying down and don't want to hold it the whole time.