I noticed a sound from the video when you hit the power on the electric start... nefiew used to have a warhead evo and it had an electric start also, when he would put the rotostart in the back of the engin and hit the power it made the same sound. I took the engin out and dissasembled the start box and sure enough... it was stripped and all it was doing was jamming up when you hit the power button. I gave him a choice..lol "you can pay $40 at the local rip off hobby store for a new starter box on the back of the engin or $12 for a pull start". He took the pull start. Now if it isn't the starter box... then i would suggest taking the glow plug out and see if it makes a diff, if not then the box might be shot. Can you rotate it all the way one turn with your finger from underneath?