Dilemma #6

Hi Everyone!!
Hooray for our 6th and final dilemmas!!!!
My dilemma for this week has been technical issues... I don't know what the deal is, but for some reason all of the technical aspects of my lessons have been malfunctioning!!
This has been especially true for movie clips that I want to play. I will save them to my laptop, insert them into a PowerPoint, and then save the PowerPoint to a USB stick and take it to class. At home the PowerPoint works no problem movie clips and everything. When I get to school the movie clips are just pictures and won't play!! It is SO frustrating!! This has happened to me twice now and I'm really getting aggravated...
So, the other day I decided to forget the USB and just take my laptop to school and hook it directly up to the Smart Board like my mentor teachers do. Well, I got to school and my computer doesn't have the appropriate port to connect to the Smart Board!! Urgh! So yeah... I'm not exactly sure what to do at this point, because some of the clips I have are really great and would really help drive home a point to the students. It doesn't help that I have a Mac, because none of my mentor teachers know how to use a Mac, so they are all just as clueless as me...
Any suggestions? Would I get in trouble for uploading the videos to YouTube if they are movie clips from copyrighted movies? (Sorry, if "copyrighted" isn't a real word... it sounds funny, but I don't know how else to say it...)
Help!!