will 30 metres of HDMI even work

from what i know some HDMI cables even have a problem when they are more than 5 metres long
the thing is though that as surprising as it may be that a 30 metre cable exists it probably does work otherwise it would not have "been"
BUT to me it is a risky proposition and a safer option ie the actual first prize would be to buy shorter HDMI cables and use the HDMI over ethernet solution with the long run of cable being the network cable