OBS.ninja is a free web service that allows you to stream live video from a smartphone, tablet, or remote computer, directly into OBS Studio.

What this means is that you can use it to record remote video (or audio-only) interviews with more than one guest, without time limits, and on separate tracks, for free.

Here are a couple of tutorials:

Free Video Conferencing - The OBS Ninja Website App Is INCREDIBLE: https://youtu.be/8Rhtr9E3owE

From Steve Seguin, the genius developer of OBS.ninja

Getting started: The Room (OBS Ninja Podcast ep02) : https://www.youtube.com/watch?v=m1cIT1kdlEo

PRODUCTION NOTES

Recording Mic: Zoom LMF-2 Lavalier mic

Recording device: Zoom F2 32 bit float Field Recorder

Recording location: Bedroom with no pillow fort

Recording format: WAV (32-bit float mono)

Sound Treatment Mixing and EQ: Adobe Audition

Editorial Edit: Descript.com

Mastering Sound Treatment: Auphonic Productions at Auphonic.com

Auphonic.com settings [to output as a 16bit mono WAV file]: Adaptive Leveler (on), Loudness Normalization (Loudness Target -19 LUFS ), Filtering (on), Noise and Hum Reduction (Reduction Amount: Auto), Sample rate: 44.1kHz

I uploaded the resulting WAV file to Anchor.fm to host the file and added the music from their free music stock.