Battlefield 3 tips:
I'd say to not go into the enemys base often on Canals TDM. Just take it easy and stay in the middle of the map, camp a bit.
DO NOT rage. Raging really doesn't help, trust me. xD
Have a squad of 4. On Canals make them be support and Assault mostly.
Use a gun that you're really comfortable with and you are familiar.
YouTube tips:
Get an intro (although I don't have one yet :P)
Do commentaries often that are not boring.
Have a schedule. (I'd recommend to upload once to twice a day) If you are busy with school, make A LOT of videos on the weekend and save them for during the weekand upload them during the week. If you have a schedule and record often during the weekend then that's showing that you're very dedicated to your YouTube channel.
Monotize your videos.(means to have custom cool thumbnails on your vids)
Upload some funny shit xD(I reccomend to get MW2 and troll on it, bust boosters,troll boosters,annoy people,troll trickshotters)get a cheap video card or if you're dedicated to your youtube then get the Roxio Game Capture HD Pro (100-120 dollars) and upload tips.
I subbed to your channel s please sub to me

YouTube:ReliableFpsGamer