Regarding adult-themed explicit images, let me be clear about something. The hosting company that hosts our content is Wix, and according to their policy, nudity could harm the site. This is the reason I have embedded services instead of hosting images from people, this saves us the hassle of blocking users who break the explicit images and nudity policy set by Wix.
Images and videos should be similar to TikTok, Instagram, or Facebook. I have no issues embedding images from Twitter, yet keep in mind that we have to have a strict policy regarding nudity and other types of harmful content, like harmful violence or similar content. For now, the things I have shared have not turned on any red lights.
I personally think that allowing embedded services works perfectly fine, this saves us lots of work from having to hire mods that constantly have to check posts that break the community guidelines. If you guys use storage services from Google Drive, YouTube, or TikTok, the site-embedded services work perfectly well. That would only take a few clicks to share the iframe code on our iframe element.
Chirp on, write, embed, and be happy.