update docs

CONTRIBUTING.md

@@ -77,7 +77,7 @@ Windows store version is built as a Desktop Bridge app (with `runFullTrust` capa
 ### Release built version
 
 - Open draft in github and add Release notes
-- For files `LosslessCut-mac-universal.pkg` and `LosslessCut-win-x64.appx` add prefix `-DO-NOT-DOWNLOAD`
+- Add prefix `-DO-NOT-DOWNLOAD` to `LosslessCut-mac-universal.pkg` and `LosslessCut-win-x64.appx`
 - *If GitHub release*
   - Release the draft
 - *If Store-only hotfix release*

issues.md

@@ -109,7 +109,7 @@ If the output file name has special characters that get replaced by underscore (
   - There is no installer. Just delete the folder. [More info](./installation.md).
 - Preview of H265/HEVC files is completely black or corrupted?
   - Go to settings and disable "Hardware HEVC decoding".
-- Video preview playback slow or stuttering inside LosslessCut (NVIDIA)
+- Video preview playback slow, stuttering, flickering inside LosslessCut (NVIDIA)
   - See [#922](https://github.com/mifi/lossless-cut/issues/922) [#1904](https://github.com/mifi/lossless-cut/issues/1904) [#1915](https://github.com/mifi/lossless-cut/issues/1915) [#922](https://github.com/mifi/lossless-cut/issues/922) [#2083](https://github.com/mifi/lossless-cut/issues/2083)
 - Why no `.exe`/`.zip`/`.appx` downloads?
   - I decided to stop distributing exe/zip and instead just [7zip](https://github.com/mifi/lossless-cut/releases/latest/download/LosslessCut-win-x64.7z), due to the [problems](https://github.com/mifi/lossless-cut/issues/1072#issuecomment-1066026323) that the (self-extracting) exe was causing and the large size of `.zip` files. `appx` is unsigned and [**does not work**](https://github.com/mifi/lossless-cut/issues/337).