1. What's public isn't private. You can generally film everywhere in public. Except protected areas like Bathrooms.
2. The Public Sidewalk is not private property though it may exist upon privately owned property. The nature of Sidewalks is traditional Public Forum.
3. You can record in Traditional Public Forum even if the Public area is owned by a private entity in the case of a company owned town.

TAC-US.org  is a 501(c)(4) nonprofit nonpartisan civil advocacy organization that promotes and defends our constitutional guarantees in the U.S. Our net donations and memberships are used for charitable, educational, and legal purposes.
https://www.tac-us.org/

First purpose is to challenge the ‘infringement on personal liberty’ of our ‘constitutional guarantees’. Supreme Court Justice William Douglas famously warned the court in his dissent of Terry v Ohio, “that to give the police greater power than a magistrate is to take a long step down the totalitarian path.” Douglas cautioned that there are “powerful hydraulic pressures…that bear heavily on the Court to water down constitutional guarantees and give the police the upper hand.” Our effort will culminate in 11 TAC demographic zones to challenge bad precedence in all 11 geographic zones of the Unites States Courts of Appeals and United States District Courts.

Second purpose is to mobilize resources for affirmative action(s). The present social movement primarily comprised of cop watchers, auditors and alternative journalists does not lack a collective desire for a positive future but is lacking a collective vehicle for positive action.  Strength in numbers is the common denominator for any social movement to succeed. According to social movement theory stage 1 has already brilliantly been completed with ‘emergence’ and now it’s time to accomplish stage 2 with ‘coalescence’, to unite for the common good. The present conditions and associated discontent cannot easily explain why we don’t organize. This includes the use of mainstream media and social networking to influence the news media and win favorable publicity to convince the public of the justness of our cause.|

Third purpose is to empower Pro Se jurisprudence to benefit the majority recognized by their precarity. We won’t feasibly be able to service every court case from every member, but we can embolden the right to represent oneself in court as a long-established right in the United States. Like the advocacy before us that set out to defeat the Junk Debt Buyers rubberstamp judgements through shared experiences on Pro Se cause – we too can develop the same resources for case-by-case study of the issues. These simple defenses from routine catalog of charges like obstruction and interference do not require complicated Pro Se arguments to defeat them in court. We expect to initially lose many in local kangaroo courts, and over time, change the tide of wins through public education and dissemination of information. For those courts who maliciously convict the exercise of our protected rights – see purpose number one!