@precies Having almost the same issue 7days+, first was thinking it was problem with Plesk – but on another Plesk install its working.
– When you insert YouTube link – you get just Link in backend and frontend (no thumb, no video..) ?
– Normal iframe code is working, so it isnt YouTube (block or something like that)…
– We did try different themes (TwentyTwenty, Twenty Nineteen…)
