My first effort works and is useful if you plan on changing the background colour without using a graphics program. But because there is a mask and a crop circle, you have to adjust mask positioning if you plan on moving the location of the entire circle. That can be a pain, since the mask movement is done by % (it works just fine but it might be deemed fiddly).
So here is the second version and it has some definite advantages. Same principle - copy the mlt and logo to the same folder, make sure video mode is set to HD 1080p @ 30fps and you’re good to go.
By selecting the bottom Size, position & rotate (SPR) filter, you can drag the entire circle around and the logo moves relative to that circle. Also, this method doesn’t need a mask, so the edges are cleaner. But to make it work, I had to enlarge the background of the telegram logo and make that the same colour you want the circle to be (logo isn’t transparent). It’s actually really easy to change that background in a program like GIMP, but I understand that might not be for everyone.
telegram mask v2.mlt (8.4 KB)
Anyway, this is the method I would use because I can easily alter backgrounds using a graphics program, but you can pick your poison!