Only if you are confident the video or five minute read will actually by voteworthy sight unseen. If not then you may vote first only to find that those free downvotes end up turning your blind vote into a waste, or at least low return.

If you are confident it is votewothy without examining it first, others will be too and much of the curation rewards will be returned to the pool and used elsewhere, which is good; this is not valuable curation.