These are the slides I used to give a simple conference talk based on Johannes Dorfner theme (or TUM theme?) - ojdo/thesis-defense. It utilizes XCharter fonts that support Cyrillic.
Preview was made by:
convert -density 600 BeamerPresentation.pdf -strip -resize @1048576 PNG8:slide-%02d.png
convert -layers OptimizePlus -delay 120 slide-??.png -loop 0 BeamerSlides.gif
(you need Imagemagick with legacy support of 'convert' installed)
via Converting PDF slides to animated GIFs and videos with ImageMagick by Jamie Oaks.