I wonder if it's any use reading the first letters of every strange tag top to bottom. Videos with no strange tag could suggest the end of a word. The reason for the frequent use of the word «hamster» could be that they want people to investigate the frequency of the first letters.
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P  7		20%
H  4		11%
C  4		11%
A  3		 8%
L  3		 8%
D  3
S  2
T  2
W  1
G  1
F  1
K  1
M  1
O  1
B  1
A list of letter frequencies can be found 
on Wikipedia.
As you see, P might map to E, but then things start to get difficult. The first few tags are:
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06 16 hamster
06 18 -
06 21 walruses
06 23 pirana
06 25 hamster
07 04 -
If the H of «hamster» was to be a complete word, it would more or less have to map to I. But then, the second word would read «?EI», and there are only a few rare words that match that pattern. Also, in this really long string:
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07 20 turtle - hamster
07 22 hamster
07 26 platypus
07 29 pelican - (dude)
08 03 aphid
08 06 penguin
08 10 peanuts
08 15 llama - chipmunk
there are two letters H next to each other and before two letters P. So if we maintain that P is E, H had to be a consonant letter. But obviously  there are no words that consist only of a single consonant.
Any thoughts?[/url]