mathematics and physics engineer from istanbul technical university - i am basri with a teaching certificate also from istanbul university, can prepare videos but i don't know how kind of videos you mention about, i have a white board here to prepare videos, if it is enough for math and physics videos i may be a right chose for the job, also i can tell lectures using powerpoint slides as another option as powerpoint videos, the videos may be for high school, university ext. topics not matter, thanks for interest***