Python script to convert a RouteShoot generated .kml file into an .srt subtitle file for overlaying info on the video. Add the following tag to the YouTube video to force showing the captions when the video plays: yt:cc=on.

routeshoot-kml-to-srt.py

import xml.etree.ElementTree as ET

metric = 0
kml = raw_input('Enter the KML file path and name: ')
srt = kml.replace('.kml', '.srt');
file = open(srt, 'w')

if metric == 1:
  speedUnits = '(km/h)'
  altitudeUnits = '(m)'
  distanceUnits = '(km)'
if metric == 0:
  speedUnits = '(mi/h)'
  altitudeUnits = '(ft)'
  distanceUnits = '(mi)'

tree = ET.parse(kml)
root = tree.getroot()

def formatSrtTime(secTime):
  '''Convert a time in decimal seconds to srt time format. http://code.activestate.com/recipes/577459-convert-a-youtube-transcript-in-srt-subtitle/'''
  sec, micro = str(secTime).split('.')
  m, s = divmod(int(sec), 60)
  h, m = divmod(m, 60)
  return "{:02}:{:02}:{:02},{}".format(h,m,s,micro)

for child in root.findall('./Document/Placemark/ExtendedData/SchemaData'):
  fid = child[0].text
  lat = child[1].text
  lon = child[2].text
  bearing = '%.2f' % float(child[3].text)
  speed = '%.2f' % ((float(child[4].text)*3600)/1000)
  uid = child[5].text
  altitude = '%.2f' % float(child[6].text)
  date = child[7].text
  time = child[8].text
  distance = '%.3f' % (float(child[9].text)*0.001)
  start = str(int(fid) - 1) + '.00'
  stop = str(fid) + '.00'
  if metric == 0:
    speed = '%.2f' % (float(speed)*0.621371)
    altitude = '%.2f' % (float(altitude)*3.28084)
    distance = '%.3f' % (float(distance)*0.621371)

  file.write(fid + '\n')
  file.write(formatSrtTime(start) + ' --> ' + formatSrtTime(stop) + '\n')
  file.write('sp: ' + speed + ' ' + speedUnits + ' | dist: ' + distance + ' ' +  distanceUnits + ' | elev: ' + altitude + ' ' + altitudeUnits + ' | bearing: ' + bearing + '\n')
  file.write(date + ' | ' + time + ' | lat: ' + lat + ' | lon: ' + lon + '\n')
  file.write('\n')

file.close()
print 'done!'