Replying to Focusing lens while filming video

On my t2i it's really hard to tell when it's in focus while filming video through the LCD. I was wondering if there is anyway to allow you to focus through the eyepiece while filming video?

Another question while im at it:

- When i take "large" pictures on my t2i and upload them to flickr they don't appear as big as I would like. How do I make the image bigger so I can see it to it's best potential.

+ k for answers! thanks