Tanya,
  What proxies do you recommend ...?
 
I think IgorBeg was using the following on his older computer (Charlie) and this is what is suggested in the manual:
"A good choice for proxy settings with 1080p source video is:"
   Scale Factor: 1/4
   Use Scaler: unchecked
   File Format: FFMPEG -mpeg
   Video Preset:
   Compression: mpeg.mpeg
   Bitrate: 1800000
   Quality: -1
   Pixels: yuv420p

Is it still the same process? 
I am not sure how to answer the above but the proxy code/methodology has been in place since September 2017 with only fixes and minor adjustments added. 

Also if I am using a generic ICC file for my wide gamut screen that was offered in Ubuntu studio.  Should I switch to sRGB profile since final product will be streamed in Vimeo  and YouTube?
??  Someone else will have to answer this as it is way beyond my capability!