One is why the editor is open during the video and one for the performance. On 6.2.5 and earlier, there where no speed differences between the devices, even old ones were fast. But nowadays, it feels even slower on a new i5 notebook and the the slowdown increases on old devices. If you wnat other screenshots, write me. Hopefully you’ll get rid of all these problems.
Maybe I do not switch to mobile view, because onlyoffice looks just like on the desktop. Under what condition should the site be switched to mobile view? I’m using a mobile version of the google chrome and the built-in browser, the xiaomi note 4 phone.
The resolution of my phone is fullhd 1920x1080, and I think most of them also.
By the way, in Seafile CE version 6.3.1, the file view_file_onlyoffice.html is not the same as specified. Here is a screenshot