Yeah.

You should use 都→每周末她 都 会看电影 One other common way to use 都 (dōu) is when you're talking about something that happens really often, such as "every day": 每天 (měi tiān)、every week 每周(měi zhōu )、every weekend 每周末(měi zhōu mò)

Of course. But I think "她每周末都会看电影" seems better.

I will use 每周末她”都“看电影 >> She always watch movies in weekend. 每周末她"会"看电影 >> I feel it just like "She is able to ~~" or " She can to~~" but she watch movies every weekend.

She will watch movies every weekend