Lots of possibilities here:
If you have AMP or civvie friends on WeChat, KakaoTalk or Viber you can certainly engage in sexting, with or without pics. I had one ATF send me a video of her exercising in her underwear. If they are really close friends, you can have video chats where you can ask them to show some skin or even masturbate.
Then there are the Porn sites. Lots of massage videos on there. IMHO, the Japanese massage videos are the best. If you get tired of that, hentai is a not bad either (either on sites like Hanime.tv or Hentai2Read). Yes, it's animated, but animated characters can do shit real people can't. There is obviously the LiveCams too, but I've never been into that. Though another month of this and I may just exhaust everything on Pornhub and start on that.
You could also go on SA and cultivate some contacts for when things open back up again. I may do that when it looks like we are about 2 weeks out from having restrictions lifted. Lots of opportunities for sexting there.
Another option are some of the ASMR videos. Lots of those of YouTube, ranging from PG to R rated. A few years back, a very talented girl named WhisperCrystal did a whole series of these and then just disappeared. So all her stuff is dated, but it checks the box. Not bad if you want to close your eyes and just imagine. It can be a nice change of pace & very relaxing. Sometimes I watch one of these if I'm having trouble getting to sleep.