Then there is the issue of dead people that have not been removed from the voter rolls. We know for a fact that in 2020, many of these were returned, filled out, likely by family members. That alone is an issue (example: https://youtu.be/CINHx-z9cbk ).
Here is an article with an overview of some of the laws that were changed/relaxed in 2020. Generally speaking, each relaxed restriction opens up more and more avenues for fraud:
https://abcnews.go.com/Politics/states-changed-rules-voting-...
You claim fraud and offer a video as proof. The video contradicts you. In it they explicitly say, a few times, there wasn't any fraud.
Further, at least in this election, voting and registering to vote were one in the same in many jurisdictions. Many states automatically sent out mail-in ballots to everyone that was registered. All that had to be done from there was to fill it out and send it in. Families of dead people sent in those ballots in many cases.
Registering to vote as someone else, or as an entirely fictional person, is absurdly easy in many jurisdictions. In California, for instance, one can skip any identity checks by simply marking two checkboxes: one indicating they have no ID, and one indicating they have no social security number [1]. Voila, you are now a registered voter. Combine this absurdity with automatically sent out mail-in ballots in many states, and you have a disaster waiting to happen.
I can't find any evidence for this. Further, at least where I live, ballots are mailed to voters and include a control number that ensures only one vote is counted for that person.