Thanks Anders,
I've checked the video log on your site 
public_html/media/com_easysocial/videos/6/1679091c5a880faf6fb5e6087eb1b2dc.log which recorded your FFmpeg encoding that process when the user upload a new video on your site Easysocial, it actually still showing this ffmpeg version 2.6.8 when i look at this log file.
ffmpeg version 2.6.8 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-gnutls --enable-ladspa --enable-libass --enable-libcdio --enable-libdc1394 --enable-libfaac --enable-nonfree --enable-libfdk-aac --enable-nonfree --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libx264 --enable-libx265 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
  libavutil      54. 20.100 / 54. 20.100
  libavcodec     56. 26.100 / 56. 26.100
  libavformat    56. 25.101 / 56. 25.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 11.102 /  5. 11.102
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home3/anderslolk/public_html/media/com_easysocial/videos/6/02a2d43eba379f2248d246405b7fa434':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2015-04-02 10:12:46
  Duration: 00:00:29.10, start: 0.000000, bitrate: 134 kb/s
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv), 1064x720 [SAR 1:1 DAR 133:90], 132 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default)
    Metadata:
      creation_time   : 2015-04-02 10:12:46
      handler_name    : Mainconcept MP4 Video Media Handler
      encoder         : AVC Coding
Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (/home3/anderslolk/public_html/media/com_easysocial/videos/6/7716f967.mp4) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
[libx264 @ 0x17ecec0] using SAR=1/1
[libx264 @ 0x17ecec0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
Output #0, mp4, to '/home3/anderslolk/public_html/media/com_easysocial/videos/6/7716f967.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    Stream #0:0(eng): Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 25 fps (default)
    Metadata:
      creation_time   : 2015-04-02 10:12:46
      handler_name    : Mainconcept MP4 Video Media Handler
      encoder         : Lavc56.26.100 libx264
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Is it possible consult with your hosting company to help you upgrade your FFMpeg version to v2.8.x ? Because different FFmpeg version also have different syntax, it might caused the issue and currently Easysocial only support to this FFMpeg version v2.8.x.
And i also realised if i run this command on your SSH 
ffmpeg -version , it actually show the different version (4.0.1-static).
http://take.ms/NAJg9
I believe as long as your hosting company can able to help you install this ffmpeg 2.8.x version, then this issue will be solve.