Alexander, the web site you use (ibb.co) is trying to insert some adware scripts, which are automatically blocked by the antivirus program as malware script content (object https://cdn.siteswitchcontent.com/js/push/subscribe.js?v=1.1.0). You may use other web site, for example Google drive. Try to install antivirus software on your computer, for example Kaspersky Free.
Regarding the Russian cyrillic issue - there is no problem to use cyrillic text however not all the fonts suppport cyrillic text. You may use Arial, Calibri, Times New Roman, etc with cyrillic text, however for example, my favorite font Lucida Calligraphy has no cyrillic support. Latest Videopad versions also have reduced some available previously fonts and font Lucida Calligraphy is not available anymore. Please use Videopad available fonts with cyrillic support.