Thanks for that video, @Madeezy! I've split both your report and @Dcgdavies's into a separate thread, as it looks like your Hordafylke pledge being incomplete is preventing you from pledging to Hamtunscire (and therefore being able to complete "Poor Fellow-Soldier." I'd like to keep this investigation separate, as it's a slightly different issue to the one in the megathread.
Taking a look at your completed quest log, it doesn't look like you've completed any of the Hamtunscire arc (your first quest should be "Kingdom's End"). I can see that you've completed "A Brother's Keeper," though, which should be the last quest of the Hordafylke pledge.
Would you be able to send us another video that shows Hordafylke is still shown as pledged, despite "A Brother's Keeper" being successfully completed? In the same video, can you show us that you're unable to pledge to Hamtunscire as a result. We can then pass this along to the development team for further investigation.
Thanks!