Instagram recently launched 4.0 which includes video, as we reported earlier last week, there seems to be a an updated version to v4.0.2 which includes bug fixes and enhancements. Instagram 4.0.2 has working video viewing but not video uploading (on BlackBerry 10).
Install Instagram 4.0.2:
.BAR if you already have v4.0 installed – Simply sideload using DDPB or Google Chrome extension
.APK if you do not have v4.0 already installed you can convert/sign it using this simplified tutorial
Let us know how this goes for you!