You’ll recieve a number of folders with different versions of your video in, optimised for different social sites. To ensure the best quality, please only upload the videos to their intended services.
Instagram has changed their algorithm to how posts are delivered in users feeds... again. The last major change to the algorithm was back in 2016 when they removed chronological feeds. The whole meaning behind this update is to reduce spam and get rid of bot accounts, but as a result, it's going to affect real people who also post to the platform. If you have a verified account or a couple million followers; then the changes to the algorithm won't necessarily affect you