You're going to have to upload your old videos, because all the actual Vanilla videos on youtube are either Vurtne, Maydie or World of Roguecraft. Bare in mind that if you're the one marked, you wont appear on your own minimap because you're already on your minimap.
Until then I'll just leave you with the hunter's mark tooltip:
"Place the hunter's mark on the target, increasing the ranged attack power of all attackers against that target by x. In addition, the target of this ability can always be seen by the hunter whether it stealths or turns invisible. The target also appears on the minimap. Lasts for 2 min."
Doesn't say "appears on the hunter's minimap", however it does say that only the hunter can still see the target if it stealths or turns invisible.
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Your last point is right and wrong. Different language clients werent very common in early Vanilla, so the chances of seeing foreign items linked were low (Lower still if you played on NA servers, on the EU servers we're always being spammed with foreign links and guild recruitments)
If World of Worcraft ran on an international server in Vanilla retail (as Nostalrius does), you would have seen plenty of non-English around.