1. Do you have to pay a certain price to youtube if your vids are any longer then 10 minutes?
No you don't have to pay youtube, but you do have to verify your account by having youtube send a text to your phone.
2. Bandicam or fraps? Iv'e made some testing and with fraps i am having terrible lag. I dunno about bandicam, what's your opinion?
I like to use bandicam its relatively simple, keeps my videos at a nice size also without using up to much memory you just have to press record every 10 minutes.
3. Serious or un-serious lcpdfr videos?
I personally don't really play lcpdfr I use PPM, but I like to keep my videos some what serious.
4. Length of clip?
15-25 minutes is a good amout of time.
5. Any car mods and els?
I like to use car mods. I don't use els as it lags for me so i just use non els cars. It's mainly up to you and how well your computer will run with els on.