"Time travel" tips, or how to start a video at a specific time in Youtube, Vimeo and Dailymotion

• Youtube:
At the end of the link, just add &t=[min.]m[sec.]s. Example, &t=14m57s:
https://www.youtube.com/watch?v=MtLmgQGizYg&t=14m57s
(Video: Chrysler Turbine / Channel History - Car Documentary)

Same idea when hours are needed:
https://www.youtube.com/watch?v=BqkL2dFWZ_I&t=1h06m27s
(Video: WRC / Channel History - Car Documentary)

It works of course with multiples of lower units:
https://www.youtube.com/watch?v=BqkL2dFWZ_I&t=66m27s
https://www.youtube.com/watch?v=BqkL2dFWZ_I&t=3987s
will both show the documentary starting at 1h 06m 27s...

(& can be replaced by #, and if only seconds are used, the "s" is not mandatory: #t=3987)

• Vimeo:
Same as for Youtube, the minutes and seconds are needed. But this time its a # that is used to indicate them. Example, #t=4m30s:
https://vimeo.com/57909173#t=4m30s (or #t=270s)
(Video: One Car to Do It All / Petrolicious)

As for Youtube, h can be used when needed:
https://vimeo.com/109759624#t=1h17m04s
(Video: Who Killed the Electric Car / Entrepreneurship)

• Dailymotion:
The "magic keyword" is &start=, followed by the number of seconds since the beginning of the movie. No h, m or s, a calculation is required. To start the video at 2m 25s, &start=145:
http://www.dailymotion.com/video/xbexqe_aeroport-vehicle-racing-crash-test_auto&start=145
(Video: Aeroport vehicle racing crash test truck destruction derby / Top Gear)
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Thanks to Sandie, who showed that this option was available for Youtube videos.