You can but you have to nest the clip first and then apply warp stabiliser. If the 4/3 has to play on a TV i would export it as 1920/1080 the you don't risk that the TV will stretch it to a 16/9 (thinking it is anamorphic hd 16/9). (BTW a 4/3 in a 16/9 sequence is a pillar box not a letterbox.)
A bit of a pity they use in the example 2 camera s in the same angle it is always more difficult to colour match i say a wide shot with a close up or a detail.
You could fasten up his speaking a bit tighten it up, this would leave room for atmosphere maybe music a pause in his quote. The speeding up your footage is a bit 2 much you can use it but once or twice not all the time. I miss a bit the ambiance the mood of the place because of the speeding and maybe less shots and hold them a it longer.
I have a lot less powerful system and she edit mostly xdcam HD files with premiere. If i have to cut avchd files or h264 the playback and editing is really slow. But i would suggest you test this with your system if it works smooth with your files stick with it i would say. If you likte to collor grade in resolve or so you can still export your timeline in profess hq. The system you mention will definitely cut 4k. The problem sometimes with long gop files is that it asks a lot of math to code and decode the material so it makes it hard on your system. You can also transcode al of your material in proress proxy files edit it and relink with your original footage, create a consolidate transcode tis footage to profess hq for colour grading.
Hi i constantly select the clips if i hit pause or set an in and an out point, so if i want to edit my timeline i constantly have to deselect to not delete my clips. Is there a way i can disable this function?