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= To Create a Timelapse =
Set begin on each route to the start time of each race.
Use Locate Points on Line to create a layer that has one point every meter (about 35000 total). On a EPSG:4326 projection, this means intervals of 0,00001. Turn on "Keep Attributes" as well.
Each point will have a "distance" field, which calculates the distance of that point along the route. This may well be in hundreds of kilometers; check out the maximum value of the field, and if necessary, convert the distance to meters with the field calculator: Update distance:
"distance" * 100000
(The longest distance element should be around 21000).
Generate a second-based offset for the first and last runner past each meter, and translate it into a time:
5*60+((10*60)/1000)*"distance"
Then, calculate first_runner (string): to_time(to_datetime( "begin" ) + ((360/1000"distance")+0.01) || ' seconds') last_runner (string): to_time(to_datetime( "begin" ) + (560+(1060/1000*"distance")) || ' seconds')
Then use this layer as your starting point for Time Manager. Remember to save and mark the layer as read-only before starting.