Full screen specs: - Display rating with content descriptors for 2 seconds at start of video - Must be displayed on solid black, white or gray background - Rating's height must be no less than 50 % of the total vertical height of the video. (derek-lieu.com)
While this does meet legal requirements in my eyes sponsored content should be announced at the very start of the video, because as we are all aware very few people ever bother to read the description. (wolfsgamingblog.com)
Twitter is exploring the possibility of allowing publishers to sell preroll video ads that run at the start of their video clips on the platform. (marketwatch.com)