Support for Piped (Invidious alternative)

**Is your feature request related to a usage problem (not a bug)? Please describe.**
[Piped](https://github.com/TeamPiped/Piped) is a FOSS Invidious alternative. It would be great to be able to use Piped instances instead of Invidious ones for playing videos.

**Describe the solution you'd like to see implemented**
Instead of selecting "Invidious Instance", ability to select either a Invidious or a Piped instance.

**Describe alternatives you've considered**
N/A