այս ի՞նչ արագութիւն է՝

$ sh yt.sh https://www.youtube.com/watch?v=RcVnqFxWMDM
[youtube] RcVnqFxWMDM: Downloading webpage
[youtube] RcVnqFxWMDM: Downloading video info webpage
[youtube] RcVnqFxWMDM: Extracting video information
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[download] Destination: Amelie Lens vinyl only set-RcVnqFxWMDM.f136.mp4
[download] 100% of 690.82MiB in 00:44
[download] Destination: Amelie Lens vinyl only set-RcVnqFxWMDM.f251.webm
[download] 100% of 72.85MiB in 00:04
[ffmpeg] Merging formats into "Amelie Lens vinyl only set-RcVnqFxWMDM.mkv"

բնօրինակ սփիւռքում(եւ մեկնաբանութիւննե՞ր)