As long as the 2D triangles isn't fixed in tm2 canyon, here's a small workaround i found:

open trackmania forever (if you don't have it, download trackmania nations forever), go to Mediatracker and edit there, save as clip

copy clip from
My Documents - tmforever (or if tmuf TrackMania) - Tracks (clipname.Clip.Gbx)
to My Documents - ManiaPlanet - Replays - Clips

import clip ingame and you're set.

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In other words: tm2 is backwards compatible so clips from tm(u/n)f can be used

yea it works with other things too ;-)
music and stuff