> I don't like 60fps, it looks weird

It only looks 'weird' because you're not used to it.

Isn't that video talking about resolution? '4K' is a resolution, not a frame rate.

We're talking about frame rate.

You didn't watch it, did you?

Dude, I don't have time to watch 20-minute videos in response to every comment, especially when they don't appear relevant. You need to try to give more concise points if you want responses.

What does that have to do with framerate?

I don't know, I just watched some newly uploaded videos available exclusively in 30fps. TFA shows a screenshot where there's no 720p(30) or 1080p(30) option though, so it must be happening to some videos.

(Does it even make sense to "upgrade" a 30/29.97 fps origin video to 60fps? I don't think so.)

Videos that are submitted in 60 FPS are only available in 60 FPS. It's getting more common as the cameras as getting cheaper.

Check this for example, you should only have the choice between 60 FPS options. https://www.youtube.com/watch?v=LXb3EKWsInQ

Videos that were submitted in 30 FPS remain as they were. It doesn't make sense to create new frames out of nothing indeed.

30fps versions are still there on the server, its the default player hiding them from you. There is even 4K 30fps file available 313.

    D:\_learning>youtube-dl.exe -F https://www.youtube.com/watch?v=LXb3EKWsInQ
    [youtube] LXb3EKWsInQ: Downloading webpage
    [info] Available formats for LXb3EKWsInQ:
    format code  extension  resolution note
    249          webm       audio only tiny   57k , opus @ 50k (48000Hz), 1.89MiB
    250          webm       audio only tiny   75k , opus @ 70k (48000Hz), 2.53MiB
    140          m4a        audio only tiny  130k , m4a_dash container, mp4a.40.2@128k (44100Hz), 4.84MiB
    251          webm       audio only tiny  148k , opus @160k (48000Hz), 4.96MiB
    394          mp4        256x144    144p HDR   88k , av01.0.00M.10.0.110.09.16.09.0, 30fps, video only, 2.34MiB
    278          webm       256x144    144p   97k , webm container, vp9, 30fps, video only, 3.38MiB
    160          mp4        256x144    144p  111k , avc1.4d400c, 30fps, video only, 2.87MiB
    395          mp4        426x240    240p HDR  191k , av01.0.00M.10.0.110.09.16.09.0, 30fps, video only, 4.33MiB
    242          webm       426x240    240p  233k , vp9, 30fps, video only, 6.89MiB
    330          webm       256x144    144p60 HDR  243k , vp9.2, 60fps, video only, 7.96MiB
    133          mp4        426x240    240p  245k , avc1.4d4015, 30fps, video only, 5.86MiB
    396          mp4        640x360    360p HDR  403k , av01.0.01M.10.0.110.09.16.09.0, 30fps, video only, 8.67MiB
    243          webm       640x360    360p  435k , vp9, 30fps, video only, 12.85MiB
    331          webm       426x240    240p60 HDR  504k , vp9.2, 60fps, video only, 16.65MiB
    134          mp4        640x360    360p  633k , avc1.4d401e, 30fps, video only, 15.49MiB
    397          mp4        854x480    480p HDR  735k , av01.0.04M.10.0.110.09.16.09.0, 30fps, video only, 15.80MiB
    244          webm       854x480    480p  857k , vp9, 30fps, video only, 23.18MiB
    332          webm       640x360    360p60 HDR 1059k , vp9.2, 60fps, video only, 35.72MiB
    135          mp4        854x480    480p 1496k , avc1.4d401f, 30fps, video only, 30.03MiB
    398          mp4        1280x720   720p60 HDR 1552k , av01.0.08M.10.0.110.09.16.09.0, 60fps, video only, 35.98MiB
    247          webm       1280x720   720p 1697k , vp9, 30fps, video only, 46.97MiB
    333          webm       854x480    480p60 HDR 1988k , vp9.2, 60fps, video only, 69.11MiB
    399          mp4        1920x1080  1080p60 HDR 2683k , av01.0.09M.10.0.110.09.16.09.0, 60fps, video only, 65.43MiB
    302          webm       1280x720   720p60 2742k , vp9, 60fps, video only, 76.27MiB
    136          mp4        1280x720   720p 3220k , avc1.4d401f, 30fps, video only, 57.62MiB
    248          webm       1920x1080  1080p 3249k , vp9, 30fps, video only, 84.22MiB
    298          mp4        1280x720   720p60 3483k , avc1.4d4020, 60fps, video only, 92.61MiB
    137          mp4        1920x1080  1080p 4337k , avc1.640028, 30fps, video only, 103.11MiB
    334          webm       1280x720   720p60 HDR 4524k , vp9.2, 60fps, video only, 162.28MiB
    303          webm       1920x1080  1080p60 5018k , vp9, 60fps, video only, 134.10MiB
    299          mp4        1920x1080  1080p60 5794k , avc1.64002a, 60fps, video only, 163.70MiB
    335          webm       1920x1080  1080p60 HDR 6920k , vp9.2, 60fps, video only, 252.07MiB
    400          mp4        2560x1440  1440p60 HDR 8626k , av01.0.12M.10.0.110.09.16.09.0, 60fps, video only, 223.85MiB
    271          webm       2560x1440  1440p 9621k , vp9, 30fps, video only, 249.96MiB
    308          webm       2560x1440  1440p60 13357k , vp9, 60fps, video only, 388.12MiB
    336          webm       2560x1440  1440p60 HDR 16917k , vp9.2, 60fps, video only, 607.18MiB
    401          mp4        3840x2160  2160p60 HDR 18167k , av01.0.13M.10.0.110.09.16.09.0, 60fps, video only, 460.07MiB
    313          webm       3840x2160  2160p 18852k , vp9, 30fps, video only, 628.46MiB
    315          webm       3840x2160  2160p60 26568k , vp9, 60fps, video only, 956.39MiB
    337          webm       3840x2160  2160p60 HDR 30646k , vp9.2, 60fps, video only, 1.05GiB
    18           mp4        640x360    360p  655k , avc1.42001E, 30fps, mp4a.40.2@ 96k (44100Hz), 24.53MiB
    22           mp4        1280x720   720p 1669k , avc1.64001F, 30fps, mp4a.40.2@192k (44100Hz) (best)