Thank you for your kind words.
Make sure you are using the right target for for video (which is ffmpeg) or gif (which is for gifs). Also, make sure the name of the output file has the right extension (.MP4, .gif, .Avi, etc.)
These pictures are just an example of what you can do. I do short bursts of mp4 files (using ffmpeg to render it). I put quality to 9. I use a Width of 1920 and a Height of 1080, and do 60 frames per second. I usually render 10 seconds to a minute at a time depending on how long it takes to render a frame and the size of the project.
After I render all of the raw video, I put the files into a video editor named Kdenlive. I make sure to input the correct settings for the Kdenlive project (in my case, it is 1920 x 1080 60fps). After this I render the project as a MP4 file and upload it.
I hoped this helped.