@ignaloidas @alfredohno For shorter stuff it also depends on the video type a lot.
Popular musician like #MBR? Guaranteed seeding. Random plumbing repair video? Not so guaranteed.
And yeah, for longer content that also happens to be either very popular or interest-specific seeding would also make a difference.
This is one reason I'm glad #libtorrent has support for #WebTorrent, for all that its binding availability is atrocious outside of C++, as classic clients will be able to cooperate.