A more reliable check would be if it matches `#t=` and `m` or `s`. For example, http://www.youtube.com/watch?v=UcZyRY9f8x8#t=810 and http://www.youtube.com/watch?v=UcZyRY9f8x8#t=13m20s both work, and "Copy video URL at current time" actually returns the latter. Appropriate tests would be nice.