Just had a user knock the base unit over here ( different make of pc ) but re seated the ram and it powered on again ( had similar issues to what you...
Not sure if it helps but don't youtube have a https site versus normal http ( see if that helps with uploading via https instead of normal http ) so...
If that is the case maybe it needs some ethanol or the likes to clean off the old thermal paste from the heatsink and cpu and re do the thermal paste...
I posted the old URL to the Deployment Wizard, You should really use this one as it gives you the option as depending on weather you have an W14/W15...
Not sure if this helps but what about uploading them to youtube on an account that you can create or setup for the school and then embed the youtube...
