Hi Mike,
Videos can certainly be uploaded as long as they are less than 9Mb.
You can also private email it to me or DropBox it and I can compress it and upload it for you.
The tubular looking fluid area is certainly the short saphenous vein and you have a nice short axis image of it to prove it.
But there is still some peri-tendon fluid which I suspect is haematoma from the injury and this is adding to the distal calf oedema.
I am not surprised that there is some paradoxical movement of these tendon ends and I am a little surprised the Thompson test did not suggest a rupture.
I would suggest it is at least a high grade partial tear and an MRI might be worthwhile for staging and management.
Nice case Mike.
Steve