We're currently working on an iOS app that plays .mp4 video content via Dropbox. Using the SDK’s get Temporary Link method, we pass the resulting link into AV Player(url:…). However, the playback doesn’t kick off instantly — there’s a noticeable delay based on file size (sometimes several seconds to minutes). Interestingly, this delay also appears in Safari when opening the same link, but not when streaming directly from Dropbox’s own site. We’re testing this with a multilingual streaming platform we’re developing — <<removed>> — where instant load speed really matters.