Can decord provide random access to video frames in an URL?

## Use case:
I have a video stored in the web and the URL to it. Now I want to download specific frames of it (e.g. the 10th and 100th). Can I access these frames using decord without needing to download the full video?

Example URL: [example](https://mediandr-a.akamaihd.net/progressive/2018/0912/TV-20180912-1628-0000.ln.mp4)

## Benchmark code
```
# creating the video reader takes 30s to download the 100MB video
vr = decord.VideoReader("https://mediandr-a.akamaihd.net/progressive/2018/0912/TV-20180912-1628-0000.ln.mp4")
# The access itself is super fast
for timestamp in range(0,1000,100):
frame = vr[timestamp]
```

I rather want the video reader to be created instantly, even if the access itself takes longer as it hast to download the individual frames.