There is absolutely no limit in the number of instagram videos you can download. You are free to download any amount of instagram videos without limits.
Some of the instagram videos or accounts are private and some videos are geographically restricted by the owner. We cannot access these instagram videos, thus they cannot be downloaded.
When you left click on the download link it is normal the browser starts to play instagram video. You need to right click on download link and choose "save as" to save the instagram video.
On a PC, they are usually saved under "Downloads" folder. On IOS and android devices you can save instagram videos to browser download folder or directly to Photos app.
Most of the instagram videos we serve are in HD or Full HD format. This means that you can download highest quality instagram videos including 1080p instagram videos and 720p instagram videos.
Most of the instagram videos are already in mp4 format, we automatically convert and serve instagram to mp4 instantly if they are in different formats. You don't have to manually convert instagram videos to download in mp4