When do you go to bed every day

In this case, you would use "every day" instead of "everyday".

"everyday" is an adjective that means something like "ordinary" (check a dictionary for a better definition). In other words, "everyday" is an adjective used to describe things that you encounter, experience, etc., often/frequently, if not every day.

"every day" means every day. In this case, the noun "day" is being described by the adjective "every". This is probably what you're trying to go for here.

Nowadays, it's hard for most young people to go to bed early, just because of video games and short videos.

Everyday wWhen I lie in my bed , I couldn'an’t help picking up my smartphone and starting to scroll short videos.

Without noticing, hours have passed, and it's already midnight or even later.

I really have no idea how to resist the urge to binge-watch short videos, it'. It’s so annoying.

Every day when I lie in my bed , I couldan't help but picking up my smartphone and start to scroll short videos.

"Everyday" is the adjective form.

WHours pass without my noticing hours passed, it's already, and it gets to be midnight or even later.