I was trying to find approaches to record video of my League of Legends games. Going right through different forums and everything until I discovered a really useful tool. I've used it a couple times, and if you're computer isn't so powerful like mine, you are able to capture, record and share every moment in your game for free! This can not affect your performance.
It's really quite simple, you basically should do two things.
1. Download and install the League of Legends replays - This runs in the backgrounds and records/saves everything. Be sure you contain it running in the background when you are in a game LOL. This can record each moment that happens. Once you replay it, you are able to scroll around and view everything. There is a slow-motion button, along with fast forward and pause. The only thing missing is just a rewind button. Google LOLReplay and click the initial link for a download.
2. Download and install a free version of Fraps - This only allows you to record 30 seconds at the same time, so you will need to put them together in a video editor program. I personally use Windows Movie Maker. Once you run the replay, Fraps moments that you believe are good and deserve the spotlight. You may also keep clicking the record button should you desire to record the whole game. It will then save all the files in your Fraps/Movies folder. Open them in the Windows Movie Maker and edit it the manner in which you prefer. Google fraps download for the download.
This really is only needed should you desire to generally share with other folks via YouTube, or some other video sharing sites. If you only need to view the replays for personal gain, then this isn't needed. I've tested this approach and it works very well if you are a free of charge method. You may also use other recording software such as for instance HyperCam, but I experienced better success with Fraps. If you don't have Windows Movie Maker, or would rather an alternative, Ulead, Honestech and Power Director are similar and won't break the bank. This software does cost a tiny amount. If you desire to adhere to a Free method, I strongly suggest using Windows Movie Maker,
Although might also want to check into VirtualDub, it is just a free editor that allows you to cut, reverse, flip, resize, and apply other special effects to .avi files. It's perfect for cleaning up videos before entering them in to the timeline.