5 - 10 minutes giving a file of nearly 8GB suggests you are using "Uncompressed AVI" format. Such files are always huge and a lot of computers, even those which are pretty high-end, will struggle to play them smoothly, if at all.
What is the intended final destination of your video? That will tend to influence the format of file you are creating.
There are a lot of requests about how to export at best quality and which codec or bitrate is better but there is no specific answer. All we can say is there will be some quality loss regardless although whether it is visible on playback is debatable. The reason there is no specific answer is it depends on the source file. There is nothing to be gained by trying to produce a copy with higher bit rates than the original as there is no additional information to be transferred to the exported video. There will be some loss of information due to the fact that any editing means joins have to be made and GOP structures altered to produce a new continuous file.
Uncompressed AVI files are really for use as masters to produce copies with least visual alterations but as you have seen are huge and generally unusable outside of an editing program and really unnecessary as you can use the source files in a project to do basically the same thing with no real additional space needed on your hard drives. Such an AVI file would be useful to send to someone else to make copies from if you wanted to keep hold of the master files. HEVC produces smaller files for a given bit rate but my own preference is to use MP4 that can produce larger file sizes but to my eye produce a closer resemblance to the original files I use.
Trying to do this to my mind is a bit like trying to process raw files from a digital camera and a bit of a dark art in itself and as much a matter of taste as technical competence. This is as in as much as we can tell you about our own personal preferences but they may either not work for you, or not be to your taste.
I will echo Jeff's comment about final use of the file but also ask about the source files being used.
Magix has pretty much done the job for you by giving you presets. Unless you really know what you are doing, use a preset.
Unless I specifically need another format, I use mp4. Click on the beside Display all at the top of the export screen, click on the dropdown arrow, and select whatever goes with your project settings. My videos are almost all Full HD 1920x1080 29.97p because I'm in North America (use 25p in PAL land).
I'm in PAL land and use any frame rate. Lower frame rates for lower light levels in general unless I get too much motion blur per frame, or any another reason I feel a change of frame rate may help for a given task. My TV copes with all common frame rates. I'm not even sure if it confuses the colour any more as it used to since becoming digital broadcast or alter the pitch of the soundtrack. It could be a problem for older DVD players that are still regional, I'm not sure.
My 2013 Panasonic plasma baulks when playing MEP/VPX produced MP4's. It plays the first 30 secs or so and just stops. The file plays fine on the PC and via a USB stick in my Sony Bluray player. I have always previously exported to .mts using AC3 audio so I believe the TV does not like the AAC audio which is the default codec with a Magix Intel export template. Annoying....!