The highlighted bit above, my thoughts are the seal may have been damaged when putting the axle back in, probably dislodged the spring as previously mentioned. But, looking at your videos it's not much of a leak, I did my passenger side not too long ago as the leak was dripping on the tyre. I just replaced the inner seal and wipers as the bearings were still good.The first time they did it, they used aftermarket seals (no idea what brand). When it started leaking, I insisted they use genuine toyota seals. I provided them with a hub seal and an inner axle seal. They only replaced the inner axle seal and it's still leaking. So if the inner axle seal is the issue, it's not the type of seal, but something else, whether incorrect installation or a groove etc. I wont know till it's all stripped down again I guess.
I remember when my 80 was just out of warranty in '98 and Toyota quoted me $800 to do the front axle seals as the LHF was leaking was the prompter for me to get a workshop manual and learn to do this myself. Best $ spent back then.
The LHS side took me a fair while being new to it but then the second side I breezed through.
To be honest its not a difficult job to do, just very messy.