Ok, here is one way you can avoid another strike.
Before creating a video, make sure that the record label isnt something like WMG or UMG (which really narrows down song choice)
You could instead pitch shift the song with decreases the chance of it being detected as a copyrighted song (You can use any song for this but it doesnt ALWAYS work, and ou only need to pitch shift it a little bit)
You could also just make a back up account so if the one your using now is closed then you can start a new on the other (But you will still be replaproductions here XP)
Thats all i can think of atm XD
If yopu have anymore questions then go ahead and ask =]