1. Use a VPN (Virtual Private Network) - plenty offer free trials. Gmail is fine.
2. If the 35 videos can be a considered a "collection" then that likely could be a good option - but if one of those files are taken down by a DCMA request, the whole torrent will have to go. You don't need XXgb worth of content, but you do need to seed it to completion and preferably keep seeding it for a while to ensure at least others are seeding it as well. You get bonus seed points for simply seeding, they do add up over time.
3. There may not be a huge difference unless the other computer has different/additional bandwidth available to help seed.
Some of your questions made it worthwhile to refresh my memory on some issues (thanks!) - https://phys.org/news/2015-04-bittorrent-digital-fingerprints.html
 
					
				