The best replacement for youtube is vimeo.

The best alternatives to youtube are rated as following:
★★★★★  vimeo
★★★  viacom
★★  hulu
★★  megavideo
★★  myvideo
★★  sevenload
★★  imeem
★  facebook
★  myspace
★  dailymotion
★  tv
★  twitch
★  google video
★  nah the weeknd
★  vine
  nah ty dolla
  television
  utube
  youtube
  vevo
  google account
  vimeo quality
  soundcloud
  veoh
  wistia
  nah ty dolla sign
  facebook video
  vimeo video quality
  tv9
  live stream
  metacafe
  nah ty$
  google videos
  video
  on youtube
  music
  ifilm
  wmg
  channel
  ustream
  hollywood
  yahoo
  teachertube

Your alternative for youtube is not listed? Suggest!
Speaking about youtube, one probably shouldn't forget about or without you.

Other search terms related to youtube and their ratings are:
★★★★★ or without you
★★★ arms wide open
★★ video
★★ google plus
★★ roku
★★ trace
★ google account
★ google
★ google+
★ most views
★ me sum 41
★ you rent
★ flash mac
★ buffering
★ little help from my friends
stampy
you chris
you nilsson
software
him
sound
You have in mind a companion for youtube and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of youtube in all years. Click on graph for more.
youtube
vimeo
viacom