There is a size limit of 5mb on any one particular image or video. I chatted with Cam about this, indicating that it seemed low and restricted to me. He stated that it was on more than most of their competitors allow. I stated the Wix, likely their most formidable competitor, had a 250mb limit (5X Bookmarks limit). He implied that he was not aware of that, and that they would have to reconsider the math (?!) So, upvote this review here indicating that you would like Bookmark to increase their limit to match Wixs' 250mb !