Ability to download multiple files at the same time.

[pitzzahh]

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you'd like
When resolving the url and begin to download, remove the preview and insert the downloading video in a new card with its own progress bar, the card should have a pause and cancel button, any new content to be downloaded should be added to the same list of downloaded card (should be above the Download History list). Doing so also needs to remove the progress bar below the Download button and should be placed in each downloading card.

Describe alternatives you've considered
None

Additional context
Also, maybe add a download speed indication