Ways to quit lagging/having high ms?

In a game called League of Legends, I'd like to record and upload videos to Youtube. But, the background camera applications make me lag and I can barely play. Vertical sync and anti-aliasing is off too. I don't have a laptop for gaming(I have a Lenovo). Anyway to stop lagging but record successfully?

Your laptop is the issue honestly. The problem is that there's not much one can do. Your best option is to upgrade your RAM. It's likely that you're running out of memory. The other likely cause is the video card and on a laptop there isn't anything you can do about that. Especially since Lenovo use onboard video cards that are built into the motherboard.

Lenovo? Gaming? Those 2 words do not go together… Unless that Lenovo cost you around $2000 USD… More then likely you do not have enough ram and your processor is on the weak side…
Basically… Your choking the ram and choking the processor while your doing what your doing…
All you can " try " is… Do not run other programs at the same time… No facebook / twitter / skype / instagram / iTunes and see if that will free up some ram and processor…

My honest suggestion would be to invest in a better, gaming laptop or a desktop.