I don't think identifying uploaders to "porn platforms" is a good idea. Some reasons why:
1) I don't think their ideas make a distinction between real and fictional content. If that was put in place, it would create a pointless burden.
2) "porn platforms" are often not used just for "porn".
3) Safety?
4) Likely triggered by moral panic / misrepresentations?
Only part of the Parliament though.
Of course, I don't know what the particular basis for this is, however, if that is it, it would seem pretty weak.
Even with a stronger basis than this, it would not be particularly proportionate (or helpful).
In any case, arguments tend to be fairly speculative and unsubstantiated. That doesn't bode well for the proposition of any particular measure.
Nor is there usually a distinction between giant and small. Again, kind of burdensome.