If you are describing the quality and size of a download or stream: 720p High Definition File Size: 999MB
If you are naming a video file or organizing a digital collection: Video_Project_Final_720p_999MB.mp4 For a Technical Specification 720p [999MB]
"This encode is perfect for watching on tablets while staying under your data cap." If you are describing the quality and size
"Grab the version for the best balance of speed and quality." For a Data-Saving Tip 720p [999MB]
Here are a few ways to "put together" that text depending on where you plan to use it: For a File Name or Media Library
Optimized for storage without sacrificing HD quality. For a Casual Message or Caption If you're sending this to a friend or posting it:
"Just finished the export: Ready to upload!"