Dreamingr0b0ts is a fantastic house/trance YouTube channel with a mere 123 subscribers. (It may not technically be synthwave, but it’s synthwave-adjacent)
Some of the very oldest videos are a bit rough around the edges, but they quickly improve in quality. I like this channel because it has more of an old-school vibe than most synthwave; it reminds me a lot of early-2000s electronica, back in the days of Armin van Buuren. Vocals are present more often than not, and the vibe is more “dance” than “chillax.” Great music to stay awake during a long road trip, or to stay motivated during a big house clean-up. A lot of synthwave videos rehash the same songs over and over, but as far as I can tell these are quite fresh.
Check out their “The Daily Dose” series, each of which are albums of about 20 minutes each.