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I thought it was three seconds, did they change it?

My mistake you're right it's 3 seconds

http://i.imgur.com/FI2FcOf.png

HN won't let me correct my original post because I didn't notice this until now

source:

https://www.facebook.com/business/help/743427195703387

And if you have set auto load on, they basically pre load the first 3 seconds and that counts as a view if I'm not mistaken.

Thanks.

Seems like 5 seconds is a good threshold to determine if someone is going to stay or move along - I assume they rigorously got to this number.

I suppose the next question would be can you correlate the enabling of sound to that 5 second metric, and if so, what is the difference in engagement?

I only wonder further because dialing in ad engagement, especially as it relates to seconds of interactions, is a really interesting way to determine value of these ad plays.

5 seconds seems to short unless paired with page/mouse position, I regularly notice that videos will start playing when they are 2/3rds on the page and I'm read or looking at a picture above it only to scroll right past the video as soon as I register it's of no interest to me.